ibmvfc.c revision 039a08981a49e05f09db969cdd3f38f05a5df46f
1/* 2 * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter 3 * 4 * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation 5 * 6 * Copyright (C) IBM Corporation, 2008 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/moduleparam.h> 26#include <linux/dma-mapping.h> 27#include <linux/dmapool.h> 28#include <linux/delay.h> 29#include <linux/interrupt.h> 30#include <linux/kthread.h> 31#include <linux/of.h> 32#include <linux/stringify.h> 33#include <asm/firmware.h> 34#include <asm/irq.h> 35#include <asm/vio.h> 36#include <scsi/scsi.h> 37#include <scsi/scsi_cmnd.h> 38#include <scsi/scsi_host.h> 39#include <scsi/scsi_device.h> 40#include <scsi/scsi_tcq.h> 41#include <scsi/scsi_transport_fc.h> 42#include "ibmvfc.h" 43 44static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; 45static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; 46static unsigned int max_lun = IBMVFC_MAX_LUN; 47static unsigned int max_targets = IBMVFC_MAX_TARGETS; 48static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; 49static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; 50static unsigned int dev_loss_tmo = IBMVFC_DEV_LOSS_TMO; 51static unsigned int ibmvfc_debug = IBMVFC_DEBUG; 52static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; 53static LIST_HEAD(ibmvfc_head); 54static DEFINE_SPINLOCK(ibmvfc_driver_lock); 55static struct scsi_transport_template *ibmvfc_transport_template; 56 57MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); 58MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); 59MODULE_LICENSE("GPL"); 60MODULE_VERSION(IBMVFC_DRIVER_VERSION); 61 62module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); 63MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " 64 "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); 65module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); 66MODULE_PARM_DESC(default_timeout, 67 "Default timeout in seconds for initialization and EH commands. " 68 "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); 69module_param_named(max_requests, max_requests, uint, S_IRUGO); 70MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " 71 "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); 72module_param_named(max_lun, max_lun, uint, S_IRUGO); 73MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " 74 "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); 75module_param_named(max_targets, max_targets, uint, S_IRUGO); 76MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " 77 "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); 78module_param_named(disc_threads, disc_threads, uint, S_IRUGO | S_IWUSR); 79MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " 80 "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); 81module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); 82MODULE_PARM_DESC(debug, "Enable driver debug information. " 83 "[Default=" __stringify(IBMVFC_DEBUG) "]"); 84module_param_named(dev_loss_tmo, dev_loss_tmo, uint, S_IRUGO | S_IWUSR); 85MODULE_PARM_DESC(dev_loss_tmo, "Maximum number of seconds that the FC " 86 "transport should insulate the loss of a remote port. Once this " 87 "value is exceeded, the scsi target is removed. " 88 "[Default=" __stringify(IBMVFC_DEV_LOSS_TMO) "]"); 89module_param_named(log_level, log_level, uint, 0); 90MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " 91 "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); 92 93static const struct { 94 u16 status; 95 u16 error; 96 u8 result; 97 u8 retry; 98 int log; 99 char *name; 100} cmd_status [] = { 101 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, 102 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, 103 { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, 104 { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, 105 { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, 106 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, 107 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, 108 { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, 109 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, 110 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, 111 { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, 112 { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, 113 { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 0, 0, "link halted" }, 114 { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, 115 116 { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, 117 { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, 118 { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, 119 { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, 120 { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, 121 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, 122 { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, 123 { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, 124 { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, 125 { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, 126 127 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, 128 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, 129 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, 130 { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, 131 { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, 132 { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, 133 { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, 134 { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, 135 { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, 136 { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, 137 { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, 138 139 { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, 140}; 141 142static void ibmvfc_npiv_login(struct ibmvfc_host *); 143static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); 144static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); 145static void ibmvfc_tgt_query_target(struct ibmvfc_target *); 146 147static const char *unknown_error = "unknown error"; 148 149#ifdef CONFIG_SCSI_IBMVFC_TRACE 150/** 151 * ibmvfc_trc_start - Log a start trace entry 152 * @evt: ibmvfc event struct 153 * 154 **/ 155static void ibmvfc_trc_start(struct ibmvfc_event *evt) 156{ 157 struct ibmvfc_host *vhost = evt->vhost; 158 struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; 159 struct ibmvfc_mad_common *mad = &evt->iu.mad_common; 160 struct ibmvfc_trace_entry *entry; 161 162 entry = &vhost->trace[vhost->trace_index++]; 163 entry->evt = evt; 164 entry->time = jiffies; 165 entry->fmt = evt->crq.format; 166 entry->type = IBMVFC_TRC_START; 167 168 switch (entry->fmt) { 169 case IBMVFC_CMD_FORMAT: 170 entry->op_code = vfc_cmd->iu.cdb[0]; 171 entry->scsi_id = vfc_cmd->tgt_scsi_id; 172 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 173 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 174 entry->u.start.xfer_len = vfc_cmd->iu.xfer_len; 175 break; 176 case IBMVFC_MAD_FORMAT: 177 entry->op_code = mad->opcode; 178 break; 179 default: 180 break; 181 }; 182} 183 184/** 185 * ibmvfc_trc_end - Log an end trace entry 186 * @evt: ibmvfc event struct 187 * 188 **/ 189static void ibmvfc_trc_end(struct ibmvfc_event *evt) 190{ 191 struct ibmvfc_host *vhost = evt->vhost; 192 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 193 struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; 194 struct ibmvfc_trace_entry *entry = &vhost->trace[vhost->trace_index++]; 195 196 entry->evt = evt; 197 entry->time = jiffies; 198 entry->fmt = evt->crq.format; 199 entry->type = IBMVFC_TRC_END; 200 201 switch (entry->fmt) { 202 case IBMVFC_CMD_FORMAT: 203 entry->op_code = vfc_cmd->iu.cdb[0]; 204 entry->scsi_id = vfc_cmd->tgt_scsi_id; 205 entry->lun = scsilun_to_int(&vfc_cmd->iu.lun); 206 entry->tmf_flags = vfc_cmd->iu.tmf_flags; 207 entry->u.end.status = vfc_cmd->status; 208 entry->u.end.error = vfc_cmd->error; 209 entry->u.end.fcp_rsp_flags = vfc_cmd->rsp.flags; 210 entry->u.end.rsp_code = vfc_cmd->rsp.data.info.rsp_code; 211 entry->u.end.scsi_status = vfc_cmd->rsp.scsi_status; 212 break; 213 case IBMVFC_MAD_FORMAT: 214 entry->op_code = mad->opcode; 215 entry->u.end.status = mad->status; 216 break; 217 default: 218 break; 219 220 }; 221} 222 223#else 224#define ibmvfc_trc_start(evt) do { } while (0) 225#define ibmvfc_trc_end(evt) do { } while (0) 226#endif 227 228/** 229 * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response 230 * @status: status / error class 231 * @error: error 232 * 233 * Return value: 234 * index into cmd_status / -EINVAL on failure 235 **/ 236static int ibmvfc_get_err_index(u16 status, u16 error) 237{ 238 int i; 239 240 for (i = 0; i < ARRAY_SIZE(cmd_status); i++) 241 if ((cmd_status[i].status & status) == cmd_status[i].status && 242 cmd_status[i].error == error) 243 return i; 244 245 return -EINVAL; 246} 247 248/** 249 * ibmvfc_get_cmd_error - Find the error description for the fcp response 250 * @status: status / error class 251 * @error: error 252 * 253 * Return value: 254 * error description string 255 **/ 256static const char *ibmvfc_get_cmd_error(u16 status, u16 error) 257{ 258 int rc = ibmvfc_get_err_index(status, error); 259 if (rc >= 0) 260 return cmd_status[rc].name; 261 return unknown_error; 262} 263 264/** 265 * ibmvfc_get_err_result - Find the scsi status to return for the fcp response 266 * @vfc_cmd: ibmvfc command struct 267 * 268 * Return value: 269 * SCSI result value to return for completed command 270 **/ 271static int ibmvfc_get_err_result(struct ibmvfc_cmd *vfc_cmd) 272{ 273 int err; 274 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 275 int fc_rsp_len = rsp->fcp_rsp_len; 276 277 if ((rsp->flags & FCP_RSP_LEN_VALID) && 278 ((!fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || 279 rsp->data.info.rsp_code)) 280 return DID_ERROR << 16; 281 282 err = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 283 if (err >= 0) 284 return rsp->scsi_status | (cmd_status[err].result << 16); 285 return rsp->scsi_status | (DID_ERROR << 16); 286} 287 288/** 289 * ibmvfc_retry_cmd - Determine if error status is retryable 290 * @status: status / error class 291 * @error: error 292 * 293 * Return value: 294 * 1 if error should be retried / 0 if it should not 295 **/ 296static int ibmvfc_retry_cmd(u16 status, u16 error) 297{ 298 int rc = ibmvfc_get_err_index(status, error); 299 300 if (rc >= 0) 301 return cmd_status[rc].retry; 302 return 1; 303} 304 305static const char *unknown_fc_explain = "unknown fc explain"; 306 307static const struct { 308 u16 fc_explain; 309 char *name; 310} ls_explain [] = { 311 { 0x00, "no additional explanation" }, 312 { 0x01, "service parameter error - options" }, 313 { 0x03, "service parameter error - initiator control" }, 314 { 0x05, "service parameter error - recipient control" }, 315 { 0x07, "service parameter error - received data field size" }, 316 { 0x09, "service parameter error - concurrent seq" }, 317 { 0x0B, "service parameter error - credit" }, 318 { 0x0D, "invalid N_Port/F_Port_Name" }, 319 { 0x0E, "invalid node/Fabric Name" }, 320 { 0x0F, "invalid common service parameters" }, 321 { 0x11, "invalid association header" }, 322 { 0x13, "association header required" }, 323 { 0x15, "invalid originator S_ID" }, 324 { 0x17, "invalid OX_ID-RX-ID combination" }, 325 { 0x19, "command (request) already in progress" }, 326 { 0x1E, "N_Port Login requested" }, 327 { 0x1F, "Invalid N_Port_ID" }, 328}; 329 330static const struct { 331 u16 fc_explain; 332 char *name; 333} gs_explain [] = { 334 { 0x00, "no additional explanation" }, 335 { 0x01, "port identifier not registered" }, 336 { 0x02, "port name not registered" }, 337 { 0x03, "node name not registered" }, 338 { 0x04, "class of service not registered" }, 339 { 0x06, "initial process associator not registered" }, 340 { 0x07, "FC-4 TYPEs not registered" }, 341 { 0x08, "symbolic port name not registered" }, 342 { 0x09, "symbolic node name not registered" }, 343 { 0x0A, "port type not registered" }, 344 { 0xF0, "authorization exception" }, 345 { 0xF1, "authentication exception" }, 346 { 0xF2, "data base full" }, 347 { 0xF3, "data base empty" }, 348 { 0xF4, "processing request" }, 349 { 0xF5, "unable to verify connection" }, 350 { 0xF6, "devices not in a common zone" }, 351}; 352 353/** 354 * ibmvfc_get_ls_explain - Return the FC Explain description text 355 * @status: FC Explain status 356 * 357 * Returns: 358 * error string 359 **/ 360static const char *ibmvfc_get_ls_explain(u16 status) 361{ 362 int i; 363 364 for (i = 0; i < ARRAY_SIZE(ls_explain); i++) 365 if (ls_explain[i].fc_explain == status) 366 return ls_explain[i].name; 367 368 return unknown_fc_explain; 369} 370 371/** 372 * ibmvfc_get_gs_explain - Return the FC Explain description text 373 * @status: FC Explain status 374 * 375 * Returns: 376 * error string 377 **/ 378static const char *ibmvfc_get_gs_explain(u16 status) 379{ 380 int i; 381 382 for (i = 0; i < ARRAY_SIZE(gs_explain); i++) 383 if (gs_explain[i].fc_explain == status) 384 return gs_explain[i].name; 385 386 return unknown_fc_explain; 387} 388 389static const struct { 390 enum ibmvfc_fc_type fc_type; 391 char *name; 392} fc_type [] = { 393 { IBMVFC_FABRIC_REJECT, "fabric reject" }, 394 { IBMVFC_PORT_REJECT, "port reject" }, 395 { IBMVFC_LS_REJECT, "ELS reject" }, 396 { IBMVFC_FABRIC_BUSY, "fabric busy" }, 397 { IBMVFC_PORT_BUSY, "port busy" }, 398 { IBMVFC_BASIC_REJECT, "basic reject" }, 399}; 400 401static const char *unknown_fc_type = "unknown fc type"; 402 403/** 404 * ibmvfc_get_fc_type - Return the FC Type description text 405 * @status: FC Type error status 406 * 407 * Returns: 408 * error string 409 **/ 410static const char *ibmvfc_get_fc_type(u16 status) 411{ 412 int i; 413 414 for (i = 0; i < ARRAY_SIZE(fc_type); i++) 415 if (fc_type[i].fc_type == status) 416 return fc_type[i].name; 417 418 return unknown_fc_type; 419} 420 421/** 422 * ibmvfc_set_tgt_action - Set the next init action for the target 423 * @tgt: ibmvfc target struct 424 * @action: action to perform 425 * 426 **/ 427static void ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, 428 enum ibmvfc_target_action action) 429{ 430 switch (tgt->action) { 431 case IBMVFC_TGT_ACTION_DEL_RPORT: 432 break; 433 default: 434 tgt->action = action; 435 break; 436 } 437} 438 439/** 440 * ibmvfc_set_host_state - Set the state for the host 441 * @vhost: ibmvfc host struct 442 * @state: state to set host to 443 * 444 * Returns: 445 * 0 if state changed / non-zero if not changed 446 **/ 447static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, 448 enum ibmvfc_host_state state) 449{ 450 int rc = 0; 451 452 switch (vhost->state) { 453 case IBMVFC_HOST_OFFLINE: 454 rc = -EINVAL; 455 break; 456 default: 457 vhost->state = state; 458 break; 459 }; 460 461 return rc; 462} 463 464/** 465 * ibmvfc_set_host_action - Set the next init action for the host 466 * @vhost: ibmvfc host struct 467 * @action: action to perform 468 * 469 **/ 470static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, 471 enum ibmvfc_host_action action) 472{ 473 switch (action) { 474 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 475 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) 476 vhost->action = action; 477 break; 478 case IBMVFC_HOST_ACTION_INIT_WAIT: 479 if (vhost->action == IBMVFC_HOST_ACTION_INIT) 480 vhost->action = action; 481 break; 482 case IBMVFC_HOST_ACTION_QUERY: 483 switch (vhost->action) { 484 case IBMVFC_HOST_ACTION_INIT_WAIT: 485 case IBMVFC_HOST_ACTION_NONE: 486 case IBMVFC_HOST_ACTION_TGT_ADD: 487 vhost->action = action; 488 break; 489 default: 490 break; 491 }; 492 break; 493 case IBMVFC_HOST_ACTION_TGT_INIT: 494 if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) 495 vhost->action = action; 496 break; 497 case IBMVFC_HOST_ACTION_INIT: 498 case IBMVFC_HOST_ACTION_TGT_DEL: 499 case IBMVFC_HOST_ACTION_QUERY_TGTS: 500 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 501 case IBMVFC_HOST_ACTION_TGT_ADD: 502 case IBMVFC_HOST_ACTION_NONE: 503 default: 504 vhost->action = action; 505 break; 506 }; 507} 508 509/** 510 * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) 511 * @vhost: ibmvfc host struct 512 * 513 * Return value: 514 * nothing 515 **/ 516static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) 517{ 518 if (vhost->action == IBMVFC_HOST_ACTION_NONE) { 519 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 520 scsi_block_requests(vhost->host); 521 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 522 } 523 } else 524 vhost->reinit = 1; 525 526 wake_up(&vhost->work_wait_q); 527} 528 529/** 530 * ibmvfc_link_down - Handle a link down event from the adapter 531 * @vhost: ibmvfc host struct 532 * @state: ibmvfc host state to enter 533 * 534 **/ 535static void ibmvfc_link_down(struct ibmvfc_host *vhost, 536 enum ibmvfc_host_state state) 537{ 538 struct ibmvfc_target *tgt; 539 540 ENTER; 541 scsi_block_requests(vhost->host); 542 list_for_each_entry(tgt, &vhost->targets, queue) 543 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 544 ibmvfc_set_host_state(vhost, state); 545 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 546 vhost->events_to_log |= IBMVFC_AE_LINKDOWN; 547 wake_up(&vhost->work_wait_q); 548 LEAVE; 549} 550 551/** 552 * ibmvfc_init_host - Start host initialization 553 * @vhost: ibmvfc host struct 554 * @relogin: is this a re-login? 555 * 556 * Return value: 557 * nothing 558 **/ 559static void ibmvfc_init_host(struct ibmvfc_host *vhost, int relogin) 560{ 561 struct ibmvfc_target *tgt; 562 563 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 564 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 565 dev_err(vhost->dev, 566 "Host initialization retries exceeded. Taking adapter offline\n"); 567 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 568 return; 569 } 570 } 571 572 if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 573 if (!relogin) { 574 memset(vhost->async_crq.msgs, 0, PAGE_SIZE); 575 vhost->async_crq.cur = 0; 576 } 577 578 list_for_each_entry(tgt, &vhost->targets, queue) 579 tgt->need_login = 1; 580 scsi_block_requests(vhost->host); 581 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 582 vhost->job_step = ibmvfc_npiv_login; 583 wake_up(&vhost->work_wait_q); 584 } 585} 586 587/** 588 * ibmvfc_send_crq - Send a CRQ 589 * @vhost: ibmvfc host struct 590 * @word1: the first 64 bits of the data 591 * @word2: the second 64 bits of the data 592 * 593 * Return value: 594 * 0 on success / other on failure 595 **/ 596static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) 597{ 598 struct vio_dev *vdev = to_vio_dev(vhost->dev); 599 return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); 600} 601 602/** 603 * ibmvfc_send_crq_init - Send a CRQ init message 604 * @vhost: ibmvfc host struct 605 * 606 * Return value: 607 * 0 on success / other on failure 608 **/ 609static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) 610{ 611 ibmvfc_dbg(vhost, "Sending CRQ init\n"); 612 return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); 613} 614 615/** 616 * ibmvfc_send_crq_init_complete - Send a CRQ init complete message 617 * @vhost: ibmvfc host struct 618 * 619 * Return value: 620 * 0 on success / other on failure 621 **/ 622static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) 623{ 624 ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); 625 return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); 626} 627 628/** 629 * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ 630 * @vhost: ibmvfc host struct 631 * 632 * Frees irq, deallocates a page for messages, unmaps dma, and unregisters 633 * the crq with the hypervisor. 634 **/ 635static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) 636{ 637 long rc; 638 struct vio_dev *vdev = to_vio_dev(vhost->dev); 639 struct ibmvfc_crq_queue *crq = &vhost->crq; 640 641 ibmvfc_dbg(vhost, "Releasing CRQ\n"); 642 free_irq(vdev->irq, vhost); 643 tasklet_kill(&vhost->tasklet); 644 do { 645 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 646 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 647 648 vhost->state = IBMVFC_NO_CRQ; 649 dma_unmap_single(vhost->dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 650 free_page((unsigned long)crq->msgs); 651} 652 653/** 654 * ibmvfc_reenable_crq_queue - reenables the CRQ 655 * @vhost: ibmvfc host struct 656 * 657 * Return value: 658 * 0 on success / other on failure 659 **/ 660static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) 661{ 662 int rc; 663 struct vio_dev *vdev = to_vio_dev(vhost->dev); 664 665 /* Re-enable the CRQ */ 666 do { 667 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 668 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 669 670 if (rc) 671 dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); 672 673 return rc; 674} 675 676/** 677 * ibmvfc_reset_crq - resets a crq after a failure 678 * @vhost: ibmvfc host struct 679 * 680 * Return value: 681 * 0 on success / other on failure 682 **/ 683static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) 684{ 685 int rc; 686 struct vio_dev *vdev = to_vio_dev(vhost->dev); 687 struct ibmvfc_crq_queue *crq = &vhost->crq; 688 689 /* Close the CRQ */ 690 do { 691 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 692 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 693 694 vhost->state = IBMVFC_NO_CRQ; 695 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 696 697 /* Clean out the queue */ 698 memset(crq->msgs, 0, PAGE_SIZE); 699 crq->cur = 0; 700 701 /* And re-open it again */ 702 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 703 crq->msg_token, PAGE_SIZE); 704 705 if (rc == H_CLOSED) 706 /* Adapter is good, but other end is not ready */ 707 dev_warn(vhost->dev, "Partner adapter not ready\n"); 708 else if (rc != 0) 709 dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); 710 711 return rc; 712} 713 714/** 715 * ibmvfc_valid_event - Determines if event is valid. 716 * @pool: event_pool that contains the event 717 * @evt: ibmvfc event to be checked for validity 718 * 719 * Return value: 720 * 1 if event is valid / 0 if event is not valid 721 **/ 722static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, 723 struct ibmvfc_event *evt) 724{ 725 int index = evt - pool->events; 726 if (index < 0 || index >= pool->size) /* outside of bounds */ 727 return 0; 728 if (evt != pool->events + index) /* unaligned */ 729 return 0; 730 return 1; 731} 732 733/** 734 * ibmvfc_free_event - Free the specified event 735 * @evt: ibmvfc_event to be freed 736 * 737 **/ 738static void ibmvfc_free_event(struct ibmvfc_event *evt) 739{ 740 struct ibmvfc_host *vhost = evt->vhost; 741 struct ibmvfc_event_pool *pool = &vhost->pool; 742 743 BUG_ON(!ibmvfc_valid_event(pool, evt)); 744 BUG_ON(atomic_inc_return(&evt->free) != 1); 745 list_add_tail(&evt->queue, &vhost->free); 746} 747 748/** 749 * ibmvfc_scsi_eh_done - EH done function for queuecommand commands 750 * @evt: ibmvfc event struct 751 * 752 * This function does not setup any error status, that must be done 753 * before this function gets called. 754 **/ 755static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) 756{ 757 struct scsi_cmnd *cmnd = evt->cmnd; 758 759 if (cmnd) { 760 scsi_dma_unmap(cmnd); 761 cmnd->scsi_done(cmnd); 762 } 763 764 if (evt->eh_comp) 765 complete(evt->eh_comp); 766 767 ibmvfc_free_event(evt); 768} 769 770/** 771 * ibmvfc_fail_request - Fail request with specified error code 772 * @evt: ibmvfc event struct 773 * @error_code: error code to fail request with 774 * 775 * Return value: 776 * none 777 **/ 778static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) 779{ 780 if (evt->cmnd) { 781 evt->cmnd->result = (error_code << 16); 782 evt->done = ibmvfc_scsi_eh_done; 783 } else 784 evt->xfer_iu->mad_common.status = IBMVFC_MAD_DRIVER_FAILED; 785 786 list_del(&evt->queue); 787 del_timer(&evt->timer); 788 ibmvfc_trc_end(evt); 789 evt->done(evt); 790} 791 792/** 793 * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests 794 * @vhost: ibmvfc host struct 795 * @error_code: error code to fail requests with 796 * 797 * Return value: 798 * none 799 **/ 800static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) 801{ 802 struct ibmvfc_event *evt, *pos; 803 804 ibmvfc_dbg(vhost, "Purging all requests\n"); 805 list_for_each_entry_safe(evt, pos, &vhost->sent, queue) 806 ibmvfc_fail_request(evt, error_code); 807} 808 809/** 810 * __ibmvfc_reset_host - Reset the connection to the server (no locking) 811 * @vhost: struct ibmvfc host to reset 812 **/ 813static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) 814{ 815 int rc; 816 817 scsi_block_requests(vhost->host); 818 ibmvfc_purge_requests(vhost, DID_ERROR); 819 if ((rc = ibmvfc_reset_crq(vhost)) || 820 (rc = ibmvfc_send_crq_init(vhost)) || 821 (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { 822 dev_err(vhost->dev, "Error after reset rc=%d\n", rc); 823 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 824 } else 825 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 826} 827 828/** 829 * ibmvfc_reset_host - Reset the connection to the server 830 * @vhost: struct ibmvfc host to reset 831 **/ 832static void ibmvfc_reset_host(struct ibmvfc_host *vhost) 833{ 834 unsigned long flags; 835 836 spin_lock_irqsave(vhost->host->host_lock, flags); 837 __ibmvfc_reset_host(vhost); 838 spin_unlock_irqrestore(vhost->host->host_lock, flags); 839} 840 841/** 842 * ibmvfc_retry_host_init - Retry host initialization if allowed 843 * @vhost: ibmvfc host struct 844 * 845 **/ 846static void ibmvfc_retry_host_init(struct ibmvfc_host *vhost) 847{ 848 if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { 849 vhost->delay_init = 1; 850 if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { 851 dev_err(vhost->dev, 852 "Host initialization retries exceeded. Taking adapter offline\n"); 853 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 854 } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) 855 __ibmvfc_reset_host(vhost); 856 else 857 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 858 } 859 860 wake_up(&vhost->work_wait_q); 861} 862 863/** 864 * __ibmvfc_get_target - Find the specified scsi_target (no locking) 865 * @starget: scsi target struct 866 * 867 * Return value: 868 * ibmvfc_target struct / NULL if not found 869 **/ 870static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) 871{ 872 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 873 struct ibmvfc_host *vhost = shost_priv(shost); 874 struct ibmvfc_target *tgt; 875 876 list_for_each_entry(tgt, &vhost->targets, queue) 877 if (tgt->target_id == starget->id) { 878 kref_get(&tgt->kref); 879 return tgt; 880 } 881 return NULL; 882} 883 884/** 885 * ibmvfc_get_target - Find the specified scsi_target 886 * @starget: scsi target struct 887 * 888 * Return value: 889 * ibmvfc_target struct / NULL if not found 890 **/ 891static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) 892{ 893 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 894 struct ibmvfc_target *tgt; 895 unsigned long flags; 896 897 spin_lock_irqsave(shost->host_lock, flags); 898 tgt = __ibmvfc_get_target(starget); 899 spin_unlock_irqrestore(shost->host_lock, flags); 900 return tgt; 901} 902 903/** 904 * ibmvfc_get_host_speed - Get host port speed 905 * @shost: scsi host struct 906 * 907 * Return value: 908 * none 909 **/ 910static void ibmvfc_get_host_speed(struct Scsi_Host *shost) 911{ 912 struct ibmvfc_host *vhost = shost_priv(shost); 913 unsigned long flags; 914 915 spin_lock_irqsave(shost->host_lock, flags); 916 if (vhost->state == IBMVFC_ACTIVE) { 917 switch (vhost->login_buf->resp.link_speed / 100) { 918 case 1: 919 fc_host_speed(shost) = FC_PORTSPEED_1GBIT; 920 break; 921 case 2: 922 fc_host_speed(shost) = FC_PORTSPEED_2GBIT; 923 break; 924 case 4: 925 fc_host_speed(shost) = FC_PORTSPEED_4GBIT; 926 break; 927 case 8: 928 fc_host_speed(shost) = FC_PORTSPEED_8GBIT; 929 break; 930 case 10: 931 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 932 break; 933 case 16: 934 fc_host_speed(shost) = FC_PORTSPEED_16GBIT; 935 break; 936 default: 937 ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", 938 vhost->login_buf->resp.link_speed / 100); 939 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 940 break; 941 } 942 } else 943 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 944 spin_unlock_irqrestore(shost->host_lock, flags); 945} 946 947/** 948 * ibmvfc_get_host_port_state - Get host port state 949 * @shost: scsi host struct 950 * 951 * Return value: 952 * none 953 **/ 954static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) 955{ 956 struct ibmvfc_host *vhost = shost_priv(shost); 957 unsigned long flags; 958 959 spin_lock_irqsave(shost->host_lock, flags); 960 switch (vhost->state) { 961 case IBMVFC_INITIALIZING: 962 case IBMVFC_ACTIVE: 963 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; 964 break; 965 case IBMVFC_LINK_DOWN: 966 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; 967 break; 968 case IBMVFC_LINK_DEAD: 969 case IBMVFC_HOST_OFFLINE: 970 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; 971 break; 972 case IBMVFC_HALTED: 973 fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; 974 break; 975 case IBMVFC_NO_CRQ: 976 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 977 break; 978 default: 979 ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); 980 fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; 981 break; 982 } 983 spin_unlock_irqrestore(shost->host_lock, flags); 984} 985 986/** 987 * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout 988 * @rport: rport struct 989 * @timeout: timeout value 990 * 991 * Return value: 992 * none 993 **/ 994static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 995{ 996 if (timeout) 997 rport->dev_loss_tmo = timeout; 998 else 999 rport->dev_loss_tmo = 1; 1000} 1001 1002/** 1003 * ibmvfc_release_tgt - Free memory allocated for a target 1004 * @kref: kref struct 1005 * 1006 **/ 1007static void ibmvfc_release_tgt(struct kref *kref) 1008{ 1009 struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); 1010 kfree(tgt); 1011} 1012 1013/** 1014 * ibmvfc_get_starget_node_name - Get SCSI target's node name 1015 * @starget: scsi target struct 1016 * 1017 * Return value: 1018 * none 1019 **/ 1020static void ibmvfc_get_starget_node_name(struct scsi_target *starget) 1021{ 1022 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1023 fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; 1024 if (tgt) 1025 kref_put(&tgt->kref, ibmvfc_release_tgt); 1026} 1027 1028/** 1029 * ibmvfc_get_starget_port_name - Get SCSI target's port name 1030 * @starget: scsi target struct 1031 * 1032 * Return value: 1033 * none 1034 **/ 1035static void ibmvfc_get_starget_port_name(struct scsi_target *starget) 1036{ 1037 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1038 fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; 1039 if (tgt) 1040 kref_put(&tgt->kref, ibmvfc_release_tgt); 1041} 1042 1043/** 1044 * ibmvfc_get_starget_port_id - Get SCSI target's port ID 1045 * @starget: scsi target struct 1046 * 1047 * Return value: 1048 * none 1049 **/ 1050static void ibmvfc_get_starget_port_id(struct scsi_target *starget) 1051{ 1052 struct ibmvfc_target *tgt = ibmvfc_get_target(starget); 1053 fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; 1054 if (tgt) 1055 kref_put(&tgt->kref, ibmvfc_release_tgt); 1056} 1057 1058/** 1059 * ibmvfc_wait_while_resetting - Wait while the host resets 1060 * @vhost: ibmvfc host struct 1061 * 1062 * Return value: 1063 * 0 on success / other on failure 1064 **/ 1065static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) 1066{ 1067 long timeout = wait_event_timeout(vhost->init_wait_q, 1068 ((vhost->state == IBMVFC_ACTIVE || 1069 vhost->state == IBMVFC_HOST_OFFLINE || 1070 vhost->state == IBMVFC_LINK_DEAD) && 1071 vhost->action == IBMVFC_HOST_ACTION_NONE), 1072 (init_timeout * HZ)); 1073 1074 return timeout ? 0 : -EIO; 1075} 1076 1077/** 1078 * ibmvfc_issue_fc_host_lip - Re-initiate link initialization 1079 * @shost: scsi host struct 1080 * 1081 * Return value: 1082 * 0 on success / other on failure 1083 **/ 1084static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) 1085{ 1086 struct ibmvfc_host *vhost = shost_priv(shost); 1087 1088 dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); 1089 ibmvfc_reset_host(vhost); 1090 return ibmvfc_wait_while_resetting(vhost); 1091} 1092 1093/** 1094 * ibmvfc_gather_partition_info - Gather info about the LPAR 1095 * 1096 * Return value: 1097 * none 1098 **/ 1099static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) 1100{ 1101 struct device_node *rootdn; 1102 const char *name; 1103 const unsigned int *num; 1104 1105 rootdn = of_find_node_by_path("/"); 1106 if (!rootdn) 1107 return; 1108 1109 name = of_get_property(rootdn, "ibm,partition-name", NULL); 1110 if (name) 1111 strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); 1112 num = of_get_property(rootdn, "ibm,partition-no", NULL); 1113 if (num) 1114 vhost->partition_number = *num; 1115 of_node_put(rootdn); 1116} 1117 1118/** 1119 * ibmvfc_set_login_info - Setup info for NPIV login 1120 * @vhost: ibmvfc host struct 1121 * 1122 * Return value: 1123 * none 1124 **/ 1125static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) 1126{ 1127 struct ibmvfc_npiv_login *login_info = &vhost->login_info; 1128 struct device_node *of_node = vhost->dev->archdata.of_node; 1129 const char *location; 1130 1131 memset(login_info, 0, sizeof(*login_info)); 1132 1133 login_info->ostype = IBMVFC_OS_LINUX; 1134 login_info->max_dma_len = IBMVFC_MAX_SECTORS << 9; 1135 login_info->max_payload = sizeof(struct ibmvfc_fcp_cmd_iu); 1136 login_info->max_response = sizeof(struct ibmvfc_fcp_rsp); 1137 login_info->partition_num = vhost->partition_number; 1138 login_info->vfc_frame_version = 1; 1139 login_info->fcp_version = 3; 1140 if (vhost->client_migrated) 1141 login_info->flags = IBMVFC_CLIENT_MIGRATED; 1142 1143 login_info->max_cmds = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1144 login_info->capabilities = IBMVFC_CAN_MIGRATE; 1145 login_info->async.va = vhost->async_crq.msg_token; 1146 login_info->async.len = vhost->async_crq.size * sizeof(*vhost->async_crq.msgs); 1147 strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); 1148 strncpy(login_info->device_name, 1149 dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); 1150 1151 location = of_get_property(of_node, "ibm,loc-code", NULL); 1152 location = location ? location : dev_name(vhost->dev); 1153 strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); 1154} 1155 1156/** 1157 * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host 1158 * @vhost: ibmvfc host who owns the event pool 1159 * 1160 * Returns zero on success. 1161 **/ 1162static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost) 1163{ 1164 int i; 1165 struct ibmvfc_event_pool *pool = &vhost->pool; 1166 1167 ENTER; 1168 pool->size = max_requests + IBMVFC_NUM_INTERNAL_REQ; 1169 pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); 1170 if (!pool->events) 1171 return -ENOMEM; 1172 1173 pool->iu_storage = dma_alloc_coherent(vhost->dev, 1174 pool->size * sizeof(*pool->iu_storage), 1175 &pool->iu_token, 0); 1176 1177 if (!pool->iu_storage) { 1178 kfree(pool->events); 1179 return -ENOMEM; 1180 } 1181 1182 for (i = 0; i < pool->size; ++i) { 1183 struct ibmvfc_event *evt = &pool->events[i]; 1184 atomic_set(&evt->free, 1); 1185 evt->crq.valid = 0x80; 1186 evt->crq.ioba = pool->iu_token + (sizeof(*evt->xfer_iu) * i); 1187 evt->xfer_iu = pool->iu_storage + i; 1188 evt->vhost = vhost; 1189 evt->ext_list = NULL; 1190 list_add_tail(&evt->queue, &vhost->free); 1191 } 1192 1193 LEAVE; 1194 return 0; 1195} 1196 1197/** 1198 * ibmvfc_free_event_pool - Frees memory of the event pool of a host 1199 * @vhost: ibmvfc host who owns the event pool 1200 * 1201 **/ 1202static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost) 1203{ 1204 int i; 1205 struct ibmvfc_event_pool *pool = &vhost->pool; 1206 1207 ENTER; 1208 for (i = 0; i < pool->size; ++i) { 1209 list_del(&pool->events[i].queue); 1210 BUG_ON(atomic_read(&pool->events[i].free) != 1); 1211 if (pool->events[i].ext_list) 1212 dma_pool_free(vhost->sg_pool, 1213 pool->events[i].ext_list, 1214 pool->events[i].ext_list_token); 1215 } 1216 1217 kfree(pool->events); 1218 dma_free_coherent(vhost->dev, 1219 pool->size * sizeof(*pool->iu_storage), 1220 pool->iu_storage, pool->iu_token); 1221 LEAVE; 1222} 1223 1224/** 1225 * ibmvfc_get_event - Gets the next free event in pool 1226 * @vhost: ibmvfc host struct 1227 * 1228 * Returns a free event from the pool. 1229 **/ 1230static struct ibmvfc_event *ibmvfc_get_event(struct ibmvfc_host *vhost) 1231{ 1232 struct ibmvfc_event *evt; 1233 1234 BUG_ON(list_empty(&vhost->free)); 1235 evt = list_entry(vhost->free.next, struct ibmvfc_event, queue); 1236 atomic_set(&evt->free, 0); 1237 list_del(&evt->queue); 1238 return evt; 1239} 1240 1241/** 1242 * ibmvfc_init_event - Initialize fields in an event struct that are always 1243 * required. 1244 * @evt: The event 1245 * @done: Routine to call when the event is responded to 1246 * @format: SRP or MAD format 1247 **/ 1248static void ibmvfc_init_event(struct ibmvfc_event *evt, 1249 void (*done) (struct ibmvfc_event *), u8 format) 1250{ 1251 evt->cmnd = NULL; 1252 evt->sync_iu = NULL; 1253 evt->crq.format = format; 1254 evt->done = done; 1255 evt->eh_comp = NULL; 1256} 1257 1258/** 1259 * ibmvfc_map_sg_list - Initialize scatterlist 1260 * @scmd: scsi command struct 1261 * @nseg: number of scatterlist segments 1262 * @md: memory descriptor list to initialize 1263 **/ 1264static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, 1265 struct srp_direct_buf *md) 1266{ 1267 int i; 1268 struct scatterlist *sg; 1269 1270 scsi_for_each_sg(scmd, sg, nseg, i) { 1271 md[i].va = sg_dma_address(sg); 1272 md[i].len = sg_dma_len(sg); 1273 md[i].key = 0; 1274 } 1275} 1276 1277/** 1278 * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes decriptor fields 1279 * @scmd: Scsi_Cmnd with the scatterlist 1280 * @evt: ibmvfc event struct 1281 * @vfc_cmd: vfc_cmd that contains the memory descriptor 1282 * @dev: device for which to map dma memory 1283 * 1284 * Returns: 1285 * 0 on success / non-zero on failure 1286 **/ 1287static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, 1288 struct ibmvfc_event *evt, 1289 struct ibmvfc_cmd *vfc_cmd, struct device *dev) 1290{ 1291 1292 int sg_mapped; 1293 struct srp_direct_buf *data = &vfc_cmd->ioba; 1294 struct ibmvfc_host *vhost = dev_get_drvdata(dev); 1295 1296 sg_mapped = scsi_dma_map(scmd); 1297 if (!sg_mapped) { 1298 vfc_cmd->flags |= IBMVFC_NO_MEM_DESC; 1299 return 0; 1300 } else if (unlikely(sg_mapped < 0)) { 1301 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1302 scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); 1303 return sg_mapped; 1304 } 1305 1306 if (scmd->sc_data_direction == DMA_TO_DEVICE) { 1307 vfc_cmd->flags |= IBMVFC_WRITE; 1308 vfc_cmd->iu.add_cdb_len |= IBMVFC_WRDATA; 1309 } else { 1310 vfc_cmd->flags |= IBMVFC_READ; 1311 vfc_cmd->iu.add_cdb_len |= IBMVFC_RDDATA; 1312 } 1313 1314 if (sg_mapped == 1) { 1315 ibmvfc_map_sg_list(scmd, sg_mapped, data); 1316 return 0; 1317 } 1318 1319 vfc_cmd->flags |= IBMVFC_SCATTERLIST; 1320 1321 if (!evt->ext_list) { 1322 evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, 1323 &evt->ext_list_token); 1324 1325 if (!evt->ext_list) { 1326 scsi_dma_unmap(scmd); 1327 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1328 scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); 1329 return -ENOMEM; 1330 } 1331 } 1332 1333 ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); 1334 1335 data->va = evt->ext_list_token; 1336 data->len = sg_mapped * sizeof(struct srp_direct_buf); 1337 data->key = 0; 1338 return 0; 1339} 1340 1341/** 1342 * ibmvfc_timeout - Internal command timeout handler 1343 * @evt: struct ibmvfc_event that timed out 1344 * 1345 * Called when an internally generated command times out 1346 **/ 1347static void ibmvfc_timeout(struct ibmvfc_event *evt) 1348{ 1349 struct ibmvfc_host *vhost = evt->vhost; 1350 dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); 1351 ibmvfc_reset_host(vhost); 1352} 1353 1354/** 1355 * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() 1356 * @evt: event to be sent 1357 * @vhost: ibmvfc host struct 1358 * @timeout: timeout in seconds - 0 means do not time command 1359 * 1360 * Returns the value returned from ibmvfc_send_crq(). (Zero for success) 1361 **/ 1362static int ibmvfc_send_event(struct ibmvfc_event *evt, 1363 struct ibmvfc_host *vhost, unsigned long timeout) 1364{ 1365 u64 *crq_as_u64 = (u64 *) &evt->crq; 1366 int rc; 1367 1368 /* Copy the IU into the transfer area */ 1369 *evt->xfer_iu = evt->iu; 1370 if (evt->crq.format == IBMVFC_CMD_FORMAT) 1371 evt->xfer_iu->cmd.tag = (u64)evt; 1372 else if (evt->crq.format == IBMVFC_MAD_FORMAT) 1373 evt->xfer_iu->mad_common.tag = (u64)evt; 1374 else 1375 BUG(); 1376 1377 list_add_tail(&evt->queue, &vhost->sent); 1378 init_timer(&evt->timer); 1379 1380 if (timeout) { 1381 evt->timer.data = (unsigned long) evt; 1382 evt->timer.expires = jiffies + (timeout * HZ); 1383 evt->timer.function = (void (*)(unsigned long))ibmvfc_timeout; 1384 add_timer(&evt->timer); 1385 } 1386 1387 mb(); 1388 1389 if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) { 1390 list_del(&evt->queue); 1391 del_timer(&evt->timer); 1392 1393 /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. 1394 * Firmware will send a CRQ with a transport event (0xFF) to 1395 * tell this client what has happened to the transport. This 1396 * will be handled in ibmvfc_handle_crq() 1397 */ 1398 if (rc == H_CLOSED) { 1399 if (printk_ratelimit()) 1400 dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); 1401 if (evt->cmnd) 1402 scsi_dma_unmap(evt->cmnd); 1403 ibmvfc_free_event(evt); 1404 return SCSI_MLQUEUE_HOST_BUSY; 1405 } 1406 1407 dev_err(vhost->dev, "Send error (rc=%d)\n", rc); 1408 if (evt->cmnd) { 1409 evt->cmnd->result = DID_ERROR << 16; 1410 evt->done = ibmvfc_scsi_eh_done; 1411 } else 1412 evt->xfer_iu->mad_common.status = IBMVFC_MAD_CRQ_ERROR; 1413 1414 evt->done(evt); 1415 } else 1416 ibmvfc_trc_start(evt); 1417 1418 return 0; 1419} 1420 1421/** 1422 * ibmvfc_log_error - Log an error for the failed command if appropriate 1423 * @evt: ibmvfc event to log 1424 * 1425 **/ 1426static void ibmvfc_log_error(struct ibmvfc_event *evt) 1427{ 1428 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1429 struct ibmvfc_host *vhost = evt->vhost; 1430 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1431 struct scsi_cmnd *cmnd = evt->cmnd; 1432 const char *err = unknown_error; 1433 int index = ibmvfc_get_err_index(vfc_cmd->status, vfc_cmd->error); 1434 int logerr = 0; 1435 int rsp_code = 0; 1436 1437 if (index >= 0) { 1438 logerr = cmd_status[index].log; 1439 err = cmd_status[index].name; 1440 } 1441 1442 if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) 1443 return; 1444 1445 if (rsp->flags & FCP_RSP_LEN_VALID) 1446 rsp_code = rsp->data.info.rsp_code; 1447 1448 scmd_printk(KERN_ERR, cmnd, "Command (%02X) failed: %s (%x:%x) " 1449 "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", 1450 cmnd->cmnd[0], err, vfc_cmd->status, vfc_cmd->error, 1451 rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); 1452} 1453 1454/** 1455 * ibmvfc_scsi_done - Handle responses from commands 1456 * @evt: ibmvfc event to be handled 1457 * 1458 * Used as a callback when sending scsi cmds. 1459 **/ 1460static void ibmvfc_scsi_done(struct ibmvfc_event *evt) 1461{ 1462 struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; 1463 struct ibmvfc_fcp_rsp *rsp = &vfc_cmd->rsp; 1464 struct scsi_cmnd *cmnd = evt->cmnd; 1465 u32 rsp_len = 0; 1466 u32 sense_len = rsp->fcp_sense_len; 1467 1468 if (cmnd) { 1469 if (vfc_cmd->response_flags & IBMVFC_ADAPTER_RESID_VALID) 1470 scsi_set_resid(cmnd, vfc_cmd->adapter_resid); 1471 else if (rsp->flags & FCP_RESID_UNDER) 1472 scsi_set_resid(cmnd, rsp->fcp_resid); 1473 else 1474 scsi_set_resid(cmnd, 0); 1475 1476 if (vfc_cmd->status) { 1477 cmnd->result = ibmvfc_get_err_result(vfc_cmd); 1478 1479 if (rsp->flags & FCP_RSP_LEN_VALID) 1480 rsp_len = rsp->fcp_rsp_len; 1481 if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) 1482 sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; 1483 if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) 1484 memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); 1485 if ((vfc_cmd->status & IBMVFC_VIOS_FAILURE) && (vfc_cmd->error == IBMVFC_PLOGI_REQUIRED)) 1486 ibmvfc_reinit_host(evt->vhost); 1487 1488 if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) 1489 cmnd->result = (DID_ERROR << 16); 1490 1491 ibmvfc_log_error(evt); 1492 } 1493 1494 if (!cmnd->result && 1495 (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) 1496 cmnd->result = (DID_ERROR << 16); 1497 1498 scsi_dma_unmap(cmnd); 1499 cmnd->scsi_done(cmnd); 1500 } 1501 1502 if (evt->eh_comp) 1503 complete(evt->eh_comp); 1504 1505 ibmvfc_free_event(evt); 1506} 1507 1508/** 1509 * ibmvfc_host_chkready - Check if the host can accept commands 1510 * @vhost: struct ibmvfc host 1511 * 1512 * Returns: 1513 * 1 if host can accept command / 0 if not 1514 **/ 1515static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) 1516{ 1517 int result = 0; 1518 1519 switch (vhost->state) { 1520 case IBMVFC_LINK_DEAD: 1521 case IBMVFC_HOST_OFFLINE: 1522 result = DID_NO_CONNECT << 16; 1523 break; 1524 case IBMVFC_NO_CRQ: 1525 case IBMVFC_INITIALIZING: 1526 case IBMVFC_HALTED: 1527 case IBMVFC_LINK_DOWN: 1528 result = DID_REQUEUE << 16; 1529 break; 1530 case IBMVFC_ACTIVE: 1531 result = 0; 1532 break; 1533 }; 1534 1535 return result; 1536} 1537 1538/** 1539 * ibmvfc_queuecommand - The queuecommand function of the scsi template 1540 * @cmnd: struct scsi_cmnd to be executed 1541 * @done: Callback function to be called when cmnd is completed 1542 * 1543 * Returns: 1544 * 0 on success / other on failure 1545 **/ 1546static int ibmvfc_queuecommand(struct scsi_cmnd *cmnd, 1547 void (*done) (struct scsi_cmnd *)) 1548{ 1549 struct ibmvfc_host *vhost = shost_priv(cmnd->device->host); 1550 struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); 1551 struct ibmvfc_cmd *vfc_cmd; 1552 struct ibmvfc_event *evt; 1553 u8 tag[2]; 1554 int rc; 1555 1556 if (unlikely((rc = fc_remote_port_chkready(rport))) || 1557 unlikely((rc = ibmvfc_host_chkready(vhost)))) { 1558 cmnd->result = rc; 1559 done(cmnd); 1560 return 0; 1561 } 1562 1563 cmnd->result = (DID_OK << 16); 1564 evt = ibmvfc_get_event(vhost); 1565 ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); 1566 evt->cmnd = cmnd; 1567 cmnd->scsi_done = done; 1568 vfc_cmd = &evt->iu.cmd; 1569 memset(vfc_cmd, 0, sizeof(*vfc_cmd)); 1570 vfc_cmd->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1571 vfc_cmd->resp.len = sizeof(vfc_cmd->rsp); 1572 vfc_cmd->frame_type = IBMVFC_SCSI_FCP_TYPE; 1573 vfc_cmd->payload_len = sizeof(vfc_cmd->iu); 1574 vfc_cmd->resp_len = sizeof(vfc_cmd->rsp); 1575 vfc_cmd->cancel_key = (unsigned long)cmnd->device->hostdata; 1576 vfc_cmd->tgt_scsi_id = rport->port_id; 1577 vfc_cmd->iu.xfer_len = scsi_bufflen(cmnd); 1578 int_to_scsilun(cmnd->device->lun, &vfc_cmd->iu.lun); 1579 memcpy(vfc_cmd->iu.cdb, cmnd->cmnd, cmnd->cmd_len); 1580 1581 if (scsi_populate_tag_msg(cmnd, tag)) { 1582 vfc_cmd->task_tag = tag[1]; 1583 switch (tag[0]) { 1584 case MSG_SIMPLE_TAG: 1585 vfc_cmd->iu.pri_task_attr = IBMVFC_SIMPLE_TASK; 1586 break; 1587 case MSG_HEAD_TAG: 1588 vfc_cmd->iu.pri_task_attr = IBMVFC_HEAD_OF_QUEUE; 1589 break; 1590 case MSG_ORDERED_TAG: 1591 vfc_cmd->iu.pri_task_attr = IBMVFC_ORDERED_TASK; 1592 break; 1593 }; 1594 } 1595 1596 if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) 1597 return ibmvfc_send_event(evt, vhost, 0); 1598 1599 ibmvfc_free_event(evt); 1600 if (rc == -ENOMEM) 1601 return SCSI_MLQUEUE_HOST_BUSY; 1602 1603 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1604 scmd_printk(KERN_ERR, cmnd, 1605 "Failed to map DMA buffer for command. rc=%d\n", rc); 1606 1607 cmnd->result = DID_ERROR << 16; 1608 done(cmnd); 1609 return 0; 1610} 1611 1612/** 1613 * ibmvfc_sync_completion - Signal that a synchronous command has completed 1614 * @evt: ibmvfc event struct 1615 * 1616 **/ 1617static void ibmvfc_sync_completion(struct ibmvfc_event *evt) 1618{ 1619 /* copy the response back */ 1620 if (evt->sync_iu) 1621 *evt->sync_iu = *evt->xfer_iu; 1622 1623 complete(&evt->comp); 1624} 1625 1626/** 1627 * ibmvfc_reset_device - Reset the device with the specified reset type 1628 * @sdev: scsi device to reset 1629 * @type: reset type 1630 * @desc: reset type description for log messages 1631 * 1632 * Returns: 1633 * 0 on success / other on failure 1634 **/ 1635static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) 1636{ 1637 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1638 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1639 struct ibmvfc_cmd *tmf; 1640 struct ibmvfc_event *evt = NULL; 1641 union ibmvfc_iu rsp_iu; 1642 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1643 int rsp_rc = -EBUSY; 1644 unsigned long flags; 1645 int rsp_code = 0; 1646 1647 spin_lock_irqsave(vhost->host->host_lock, flags); 1648 if (vhost->state == IBMVFC_ACTIVE) { 1649 evt = ibmvfc_get_event(vhost); 1650 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1651 1652 tmf = &evt->iu.cmd; 1653 memset(tmf, 0, sizeof(*tmf)); 1654 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1655 tmf->resp.len = sizeof(tmf->rsp); 1656 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1657 tmf->payload_len = sizeof(tmf->iu); 1658 tmf->resp_len = sizeof(tmf->rsp); 1659 tmf->cancel_key = (unsigned long)sdev->hostdata; 1660 tmf->tgt_scsi_id = rport->port_id; 1661 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1662 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1663 tmf->iu.tmf_flags = type; 1664 evt->sync_iu = &rsp_iu; 1665 1666 init_completion(&evt->comp); 1667 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1668 } 1669 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1670 1671 if (rsp_rc != 0) { 1672 sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", 1673 desc, rsp_rc); 1674 return -EIO; 1675 } 1676 1677 sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); 1678 wait_for_completion(&evt->comp); 1679 1680 if (rsp_iu.cmd.status) { 1681 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1682 rsp_code = fc_rsp->data.info.rsp_code; 1683 1684 sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " 1685 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1686 desc, ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1687 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1688 fc_rsp->scsi_status); 1689 rsp_rc = -EIO; 1690 } else 1691 sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); 1692 1693 spin_lock_irqsave(vhost->host->host_lock, flags); 1694 ibmvfc_free_event(evt); 1695 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1696 return rsp_rc; 1697} 1698 1699/** 1700 * ibmvfc_abort_task_set - Abort outstanding commands to the device 1701 * @sdev: scsi device to abort commands 1702 * 1703 * This sends an Abort Task Set to the VIOS for the specified device. This does 1704 * NOT send any cancel to the VIOS. That must be done separately. 1705 * 1706 * Returns: 1707 * 0 on success / other on failure 1708 **/ 1709static int ibmvfc_abort_task_set(struct scsi_device *sdev) 1710{ 1711 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1712 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 1713 struct ibmvfc_cmd *tmf; 1714 struct ibmvfc_event *evt, *found_evt; 1715 union ibmvfc_iu rsp_iu; 1716 struct ibmvfc_fcp_rsp *fc_rsp = &rsp_iu.cmd.rsp; 1717 int rsp_rc = -EBUSY; 1718 unsigned long flags; 1719 int rsp_code = 0; 1720 1721 spin_lock_irqsave(vhost->host->host_lock, flags); 1722 found_evt = NULL; 1723 list_for_each_entry(evt, &vhost->sent, queue) { 1724 if (evt->cmnd && evt->cmnd->device == sdev) { 1725 found_evt = evt; 1726 break; 1727 } 1728 } 1729 1730 if (!found_evt) { 1731 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1732 sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); 1733 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1734 return 0; 1735 } 1736 1737 if (vhost->state == IBMVFC_ACTIVE) { 1738 evt = ibmvfc_get_event(vhost); 1739 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); 1740 1741 tmf = &evt->iu.cmd; 1742 memset(tmf, 0, sizeof(*tmf)); 1743 tmf->resp.va = (u64)evt->crq.ioba + offsetof(struct ibmvfc_cmd, rsp); 1744 tmf->resp.len = sizeof(tmf->rsp); 1745 tmf->frame_type = IBMVFC_SCSI_FCP_TYPE; 1746 tmf->payload_len = sizeof(tmf->iu); 1747 tmf->resp_len = sizeof(tmf->rsp); 1748 tmf->cancel_key = (unsigned long)sdev->hostdata; 1749 tmf->tgt_scsi_id = rport->port_id; 1750 int_to_scsilun(sdev->lun, &tmf->iu.lun); 1751 tmf->flags = (IBMVFC_NO_MEM_DESC | IBMVFC_TMF); 1752 tmf->iu.tmf_flags = IBMVFC_ABORT_TASK_SET; 1753 evt->sync_iu = &rsp_iu; 1754 1755 init_completion(&evt->comp); 1756 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1757 } 1758 1759 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1760 1761 if (rsp_rc != 0) { 1762 sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); 1763 return -EIO; 1764 } 1765 1766 sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); 1767 wait_for_completion(&evt->comp); 1768 1769 if (rsp_iu.cmd.status) { 1770 if (fc_rsp->flags & FCP_RSP_LEN_VALID) 1771 rsp_code = fc_rsp->data.info.rsp_code; 1772 1773 sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " 1774 "flags: %x fcp_rsp: %x, scsi_status: %x\n", 1775 ibmvfc_get_cmd_error(rsp_iu.cmd.status, rsp_iu.cmd.error), 1776 rsp_iu.cmd.status, rsp_iu.cmd.error, fc_rsp->flags, rsp_code, 1777 fc_rsp->scsi_status); 1778 rsp_rc = -EIO; 1779 } else 1780 sdev_printk(KERN_INFO, sdev, "Abort successful\n"); 1781 1782 spin_lock_irqsave(vhost->host->host_lock, flags); 1783 ibmvfc_free_event(evt); 1784 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1785 return rsp_rc; 1786} 1787 1788/** 1789 * ibmvfc_cancel_all - Cancel all outstanding commands to the device 1790 * @sdev: scsi device to cancel commands 1791 * @type: type of error recovery being performed 1792 * 1793 * This sends a cancel to the VIOS for the specified device. This does 1794 * NOT send any abort to the actual device. That must be done separately. 1795 * 1796 * Returns: 1797 * 0 on success / other on failure 1798 **/ 1799static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) 1800{ 1801 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1802 struct scsi_target *starget = scsi_target(sdev); 1803 struct fc_rport *rport = starget_to_rport(starget); 1804 struct ibmvfc_tmf *tmf; 1805 struct ibmvfc_event *evt, *found_evt; 1806 union ibmvfc_iu rsp; 1807 int rsp_rc = -EBUSY; 1808 unsigned long flags; 1809 u16 status; 1810 1811 ENTER; 1812 spin_lock_irqsave(vhost->host->host_lock, flags); 1813 found_evt = NULL; 1814 list_for_each_entry(evt, &vhost->sent, queue) { 1815 if (evt->cmnd && evt->cmnd->device == sdev) { 1816 found_evt = evt; 1817 break; 1818 } 1819 } 1820 1821 if (!found_evt) { 1822 if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) 1823 sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); 1824 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1825 return 0; 1826 } 1827 1828 if (vhost->state == IBMVFC_ACTIVE) { 1829 evt = ibmvfc_get_event(vhost); 1830 ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); 1831 1832 tmf = &evt->iu.tmf; 1833 memset(tmf, 0, sizeof(*tmf)); 1834 tmf->common.version = 1; 1835 tmf->common.opcode = IBMVFC_TMF_MAD; 1836 tmf->common.length = sizeof(*tmf); 1837 tmf->scsi_id = rport->port_id; 1838 int_to_scsilun(sdev->lun, &tmf->lun); 1839 tmf->flags = (type | IBMVFC_TMF_LUA_VALID); 1840 tmf->cancel_key = (unsigned long)sdev->hostdata; 1841 tmf->my_cancel_key = (unsigned long)starget->hostdata; 1842 1843 evt->sync_iu = &rsp; 1844 init_completion(&evt->comp); 1845 rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); 1846 } 1847 1848 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1849 1850 if (rsp_rc != 0) { 1851 sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); 1852 return -EIO; 1853 } 1854 1855 sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); 1856 1857 wait_for_completion(&evt->comp); 1858 status = rsp.mad_common.status; 1859 spin_lock_irqsave(vhost->host->host_lock, flags); 1860 ibmvfc_free_event(evt); 1861 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1862 1863 if (status != IBMVFC_MAD_SUCCESS) { 1864 sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); 1865 return -EIO; 1866 } 1867 1868 sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); 1869 return 0; 1870} 1871 1872/** 1873 * ibmvfc_match_target - Match function for specified target 1874 * @evt: ibmvfc event struct 1875 * @device: device to match (starget) 1876 * 1877 * Returns: 1878 * 1 if event matches starget / 0 if event does not match starget 1879 **/ 1880static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) 1881{ 1882 if (evt->cmnd && scsi_target(evt->cmnd->device) == device) 1883 return 1; 1884 return 0; 1885} 1886 1887/** 1888 * ibmvfc_match_lun - Match function for specified LUN 1889 * @evt: ibmvfc event struct 1890 * @device: device to match (sdev) 1891 * 1892 * Returns: 1893 * 1 if event matches sdev / 0 if event does not match sdev 1894 **/ 1895static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) 1896{ 1897 if (evt->cmnd && evt->cmnd->device == device) 1898 return 1; 1899 return 0; 1900} 1901 1902/** 1903 * ibmvfc_wait_for_ops - Wait for ops to complete 1904 * @vhost: ibmvfc host struct 1905 * @device: device to match (starget or sdev) 1906 * @match: match function 1907 * 1908 * Returns: 1909 * SUCCESS / FAILED 1910 **/ 1911static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, 1912 int (*match) (struct ibmvfc_event *, void *)) 1913{ 1914 struct ibmvfc_event *evt; 1915 DECLARE_COMPLETION_ONSTACK(comp); 1916 int wait; 1917 unsigned long flags; 1918 signed long timeout = init_timeout * HZ; 1919 1920 ENTER; 1921 do { 1922 wait = 0; 1923 spin_lock_irqsave(vhost->host->host_lock, flags); 1924 list_for_each_entry(evt, &vhost->sent, queue) { 1925 if (match(evt, device)) { 1926 evt->eh_comp = ∁ 1927 wait++; 1928 } 1929 } 1930 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1931 1932 if (wait) { 1933 timeout = wait_for_completion_timeout(&comp, timeout); 1934 1935 if (!timeout) { 1936 wait = 0; 1937 spin_lock_irqsave(vhost->host->host_lock, flags); 1938 list_for_each_entry(evt, &vhost->sent, queue) { 1939 if (match(evt, device)) { 1940 evt->eh_comp = NULL; 1941 wait++; 1942 } 1943 } 1944 spin_unlock_irqrestore(vhost->host->host_lock, flags); 1945 if (wait) 1946 dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); 1947 LEAVE; 1948 return wait ? FAILED : SUCCESS; 1949 } 1950 } 1951 } while (wait); 1952 1953 LEAVE; 1954 return SUCCESS; 1955} 1956 1957/** 1958 * ibmvfc_eh_abort_handler - Abort a command 1959 * @cmd: scsi command to abort 1960 * 1961 * Returns: 1962 * SUCCESS / FAILED 1963 **/ 1964static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) 1965{ 1966 struct scsi_device *sdev = cmd->device; 1967 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1968 int cancel_rc, abort_rc; 1969 int rc = FAILED; 1970 1971 ENTER; 1972 ibmvfc_wait_while_resetting(vhost); 1973 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); 1974 abort_rc = ibmvfc_abort_task_set(sdev); 1975 1976 if (!cancel_rc && !abort_rc) 1977 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 1978 1979 LEAVE; 1980 return rc; 1981} 1982 1983/** 1984 * ibmvfc_eh_device_reset_handler - Reset a single LUN 1985 * @cmd: scsi command struct 1986 * 1987 * Returns: 1988 * SUCCESS / FAILED 1989 **/ 1990static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) 1991{ 1992 struct scsi_device *sdev = cmd->device; 1993 struct ibmvfc_host *vhost = shost_priv(sdev->host); 1994 int cancel_rc, reset_rc; 1995 int rc = FAILED; 1996 1997 ENTER; 1998 ibmvfc_wait_while_resetting(vhost); 1999 cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); 2000 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); 2001 2002 if (!cancel_rc && !reset_rc) 2003 rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); 2004 2005 LEAVE; 2006 return rc; 2007} 2008 2009/** 2010 * ibmvfc_dev_cancel_all - Device iterated cancel all function 2011 * @sdev: scsi device struct 2012 * @data: return code 2013 * 2014 **/ 2015static void ibmvfc_dev_cancel_all(struct scsi_device *sdev, void *data) 2016{ 2017 unsigned long *rc = data; 2018 *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); 2019} 2020 2021/** 2022 * ibmvfc_dev_abort_all - Device iterated abort task set function 2023 * @sdev: scsi device struct 2024 * @data: return code 2025 * 2026 **/ 2027static void ibmvfc_dev_abort_all(struct scsi_device *sdev, void *data) 2028{ 2029 unsigned long *rc = data; 2030 *rc |= ibmvfc_abort_task_set(sdev); 2031} 2032 2033/** 2034 * ibmvfc_eh_target_reset_handler - Reset the target 2035 * @cmd: scsi command struct 2036 * 2037 * Returns: 2038 * SUCCESS / FAILED 2039 **/ 2040static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) 2041{ 2042 struct scsi_device *sdev = cmd->device; 2043 struct ibmvfc_host *vhost = shost_priv(sdev->host); 2044 struct scsi_target *starget = scsi_target(sdev); 2045 int reset_rc; 2046 int rc = FAILED; 2047 unsigned long cancel_rc = 0; 2048 2049 ENTER; 2050 ibmvfc_wait_while_resetting(vhost); 2051 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2052 reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); 2053 2054 if (!cancel_rc && !reset_rc) 2055 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2056 2057 LEAVE; 2058 return rc; 2059} 2060 2061/** 2062 * ibmvfc_eh_host_reset_handler - Reset the connection to the server 2063 * @cmd: struct scsi_cmnd having problems 2064 * 2065 **/ 2066static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) 2067{ 2068 int rc; 2069 struct ibmvfc_host *vhost = shost_priv(cmd->device->host); 2070 2071 dev_err(vhost->dev, "Resetting connection due to error recovery\n"); 2072 rc = ibmvfc_issue_fc_host_lip(vhost->host); 2073 return rc ? FAILED : SUCCESS; 2074} 2075 2076/** 2077 * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. 2078 * @rport: rport struct 2079 * 2080 * Return value: 2081 * none 2082 **/ 2083static void ibmvfc_terminate_rport_io(struct fc_rport *rport) 2084{ 2085 struct scsi_target *starget = to_scsi_target(&rport->dev); 2086 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2087 struct ibmvfc_host *vhost = shost_priv(shost); 2088 unsigned long cancel_rc = 0; 2089 unsigned long abort_rc = 0; 2090 int rc = FAILED; 2091 2092 ENTER; 2093 starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all); 2094 starget_for_each_device(starget, &abort_rc, ibmvfc_dev_abort_all); 2095 2096 if (!cancel_rc && !abort_rc) 2097 rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); 2098 2099 if (rc == FAILED) 2100 ibmvfc_issue_fc_host_lip(shost); 2101 LEAVE; 2102} 2103 2104static const struct { 2105 enum ibmvfc_async_event ae; 2106 const char *desc; 2107} ae_desc [] = { 2108 { IBMVFC_AE_ELS_PLOGI, "PLOGI" }, 2109 { IBMVFC_AE_ELS_LOGO, "LOGO" }, 2110 { IBMVFC_AE_ELS_PRLO, "PRLO" }, 2111 { IBMVFC_AE_SCN_NPORT, "N-Port SCN" }, 2112 { IBMVFC_AE_SCN_GROUP, "Group SCN" }, 2113 { IBMVFC_AE_SCN_DOMAIN, "Domain SCN" }, 2114 { IBMVFC_AE_SCN_FABRIC, "Fabric SCN" }, 2115 { IBMVFC_AE_LINK_UP, "Link Up" }, 2116 { IBMVFC_AE_LINK_DOWN, "Link Down" }, 2117 { IBMVFC_AE_LINK_DEAD, "Link Dead" }, 2118 { IBMVFC_AE_HALT, "Halt" }, 2119 { IBMVFC_AE_RESUME, "Resume" }, 2120 { IBMVFC_AE_ADAPTER_FAILED, "Adapter Failed" }, 2121}; 2122 2123static const char *unknown_ae = "Unknown async"; 2124 2125/** 2126 * ibmvfc_get_ae_desc - Get text description for async event 2127 * @ae: async event 2128 * 2129 **/ 2130static const char *ibmvfc_get_ae_desc(u64 ae) 2131{ 2132 int i; 2133 2134 for (i = 0; i < ARRAY_SIZE(ae_desc); i++) 2135 if (ae_desc[i].ae == ae) 2136 return ae_desc[i].desc; 2137 2138 return unknown_ae; 2139} 2140 2141/** 2142 * ibmvfc_handle_async - Handle an async event from the adapter 2143 * @crq: crq to process 2144 * @vhost: ibmvfc host struct 2145 * 2146 **/ 2147static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, 2148 struct ibmvfc_host *vhost) 2149{ 2150 const char *desc = ibmvfc_get_ae_desc(crq->event); 2151 2152 ibmvfc_log(vhost, 3, "%s event received. scsi_id: %llx, wwpn: %llx," 2153 " node_name: %llx\n", desc, crq->scsi_id, crq->wwpn, crq->node_name); 2154 2155 switch (crq->event) { 2156 case IBMVFC_AE_LINK_UP: 2157 case IBMVFC_AE_RESUME: 2158 vhost->events_to_log |= IBMVFC_AE_LINKUP; 2159 vhost->delay_init = 1; 2160 __ibmvfc_reset_host(vhost); 2161 break; 2162 case IBMVFC_AE_SCN_FABRIC: 2163 case IBMVFC_AE_SCN_DOMAIN: 2164 vhost->events_to_log |= IBMVFC_AE_RSCN; 2165 vhost->delay_init = 1; 2166 __ibmvfc_reset_host(vhost); 2167 break; 2168 case IBMVFC_AE_SCN_NPORT: 2169 case IBMVFC_AE_SCN_GROUP: 2170 vhost->events_to_log |= IBMVFC_AE_RSCN; 2171 case IBMVFC_AE_ELS_LOGO: 2172 case IBMVFC_AE_ELS_PRLO: 2173 case IBMVFC_AE_ELS_PLOGI: 2174 ibmvfc_reinit_host(vhost); 2175 break; 2176 case IBMVFC_AE_LINK_DOWN: 2177 case IBMVFC_AE_ADAPTER_FAILED: 2178 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2179 break; 2180 case IBMVFC_AE_LINK_DEAD: 2181 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2182 break; 2183 case IBMVFC_AE_HALT: 2184 ibmvfc_link_down(vhost, IBMVFC_HALTED); 2185 break; 2186 default: 2187 dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); 2188 break; 2189 }; 2190} 2191 2192/** 2193 * ibmvfc_handle_crq - Handles and frees received events in the CRQ 2194 * @crq: Command/Response queue 2195 * @vhost: ibmvfc host struct 2196 * 2197 **/ 2198static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost) 2199{ 2200 long rc; 2201 struct ibmvfc_event *evt = (struct ibmvfc_event *)crq->ioba; 2202 2203 switch (crq->valid) { 2204 case IBMVFC_CRQ_INIT_RSP: 2205 switch (crq->format) { 2206 case IBMVFC_CRQ_INIT: 2207 dev_info(vhost->dev, "Partner initialized\n"); 2208 /* Send back a response */ 2209 rc = ibmvfc_send_crq_init_complete(vhost); 2210 if (rc == 0) 2211 ibmvfc_init_host(vhost, 0); 2212 else 2213 dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); 2214 break; 2215 case IBMVFC_CRQ_INIT_COMPLETE: 2216 dev_info(vhost->dev, "Partner initialization complete\n"); 2217 ibmvfc_init_host(vhost, 0); 2218 break; 2219 default: 2220 dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); 2221 } 2222 return; 2223 case IBMVFC_CRQ_XPORT_EVENT: 2224 vhost->state = IBMVFC_NO_CRQ; 2225 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 2226 if (crq->format == IBMVFC_PARTITION_MIGRATED) { 2227 /* We need to re-setup the interpartition connection */ 2228 dev_info(vhost->dev, "Re-enabling adapter\n"); 2229 vhost->client_migrated = 1; 2230 ibmvfc_purge_requests(vhost, DID_REQUEUE); 2231 if ((rc = ibmvfc_reenable_crq_queue(vhost)) || 2232 (rc = ibmvfc_send_crq_init(vhost))) { 2233 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2234 dev_err(vhost->dev, "Error after enable (rc=%ld)\n", rc); 2235 } else 2236 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2237 } else { 2238 dev_err(vhost->dev, "Virtual adapter failed (rc=%d)\n", crq->format); 2239 2240 ibmvfc_purge_requests(vhost, DID_ERROR); 2241 if ((rc = ibmvfc_reset_crq(vhost)) || 2242 (rc = ibmvfc_send_crq_init(vhost))) { 2243 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 2244 dev_err(vhost->dev, "Error after reset (rc=%ld)\n", rc); 2245 } else 2246 ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); 2247 } 2248 return; 2249 case IBMVFC_CRQ_CMD_RSP: 2250 break; 2251 default: 2252 dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); 2253 return; 2254 } 2255 2256 if (crq->format == IBMVFC_ASYNC_EVENT) 2257 return; 2258 2259 /* The only kind of payload CRQs we should get are responses to 2260 * things we send. Make sure this response is to something we 2261 * actually sent 2262 */ 2263 if (unlikely(!ibmvfc_valid_event(&vhost->pool, evt))) { 2264 dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", 2265 crq->ioba); 2266 return; 2267 } 2268 2269 if (unlikely(atomic_read(&evt->free))) { 2270 dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", 2271 crq->ioba); 2272 return; 2273 } 2274 2275 del_timer(&evt->timer); 2276 list_del(&evt->queue); 2277 ibmvfc_trc_end(evt); 2278 evt->done(evt); 2279} 2280 2281/** 2282 * ibmvfc_scan_finished - Check if the device scan is done. 2283 * @shost: scsi host struct 2284 * @time: current elapsed time 2285 * 2286 * Returns: 2287 * 0 if scan is not done / 1 if scan is done 2288 **/ 2289static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) 2290{ 2291 unsigned long flags; 2292 struct ibmvfc_host *vhost = shost_priv(shost); 2293 int done = 0; 2294 2295 spin_lock_irqsave(shost->host_lock, flags); 2296 if (time >= (init_timeout * HZ)) { 2297 dev_info(vhost->dev, "Scan taking longer than %d seconds, " 2298 "continuing initialization\n", init_timeout); 2299 done = 1; 2300 } 2301 2302 if (vhost->state != IBMVFC_NO_CRQ && vhost->action == IBMVFC_HOST_ACTION_NONE) 2303 done = 1; 2304 spin_unlock_irqrestore(shost->host_lock, flags); 2305 return done; 2306} 2307 2308/** 2309 * ibmvfc_slave_alloc - Setup the device's task set value 2310 * @sdev: struct scsi_device device to configure 2311 * 2312 * Set the device's task set value so that error handling works as 2313 * expected. 2314 * 2315 * Returns: 2316 * 0 on success / -ENXIO if device does not exist 2317 **/ 2318static int ibmvfc_slave_alloc(struct scsi_device *sdev) 2319{ 2320 struct Scsi_Host *shost = sdev->host; 2321 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 2322 struct ibmvfc_host *vhost = shost_priv(shost); 2323 unsigned long flags = 0; 2324 2325 if (!rport || fc_remote_port_chkready(rport)) 2326 return -ENXIO; 2327 2328 spin_lock_irqsave(shost->host_lock, flags); 2329 sdev->hostdata = (void *)(unsigned long)vhost->task_set++; 2330 spin_unlock_irqrestore(shost->host_lock, flags); 2331 return 0; 2332} 2333 2334/** 2335 * ibmvfc_target_alloc - Setup the target's task set value 2336 * @starget: struct scsi_target 2337 * 2338 * Set the target's task set value so that error handling works as 2339 * expected. 2340 * 2341 * Returns: 2342 * 0 on success / -ENXIO if device does not exist 2343 **/ 2344static int ibmvfc_target_alloc(struct scsi_target *starget) 2345{ 2346 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2347 struct ibmvfc_host *vhost = shost_priv(shost); 2348 unsigned long flags = 0; 2349 2350 spin_lock_irqsave(shost->host_lock, flags); 2351 starget->hostdata = (void *)(unsigned long)vhost->task_set++; 2352 spin_unlock_irqrestore(shost->host_lock, flags); 2353 return 0; 2354} 2355 2356/** 2357 * ibmvfc_slave_configure - Configure the device 2358 * @sdev: struct scsi_device device to configure 2359 * 2360 * Enable allow_restart for a device if it is a disk. Adjust the 2361 * queue_depth here also. 2362 * 2363 * Returns: 2364 * 0 2365 **/ 2366static int ibmvfc_slave_configure(struct scsi_device *sdev) 2367{ 2368 struct Scsi_Host *shost = sdev->host; 2369 struct fc_rport *rport = starget_to_rport(sdev->sdev_target); 2370 unsigned long flags = 0; 2371 2372 spin_lock_irqsave(shost->host_lock, flags); 2373 if (sdev->type == TYPE_DISK) 2374 sdev->allow_restart = 1; 2375 2376 if (sdev->tagged_supported) { 2377 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 2378 scsi_activate_tcq(sdev, sdev->queue_depth); 2379 } else 2380 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2381 2382 rport->dev_loss_tmo = dev_loss_tmo; 2383 spin_unlock_irqrestore(shost->host_lock, flags); 2384 return 0; 2385} 2386 2387/** 2388 * ibmvfc_change_queue_depth - Change the device's queue depth 2389 * @sdev: scsi device struct 2390 * @qdepth: depth to set 2391 * 2392 * Return value: 2393 * actual depth set 2394 **/ 2395static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) 2396{ 2397 if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) 2398 qdepth = IBMVFC_MAX_CMDS_PER_LUN; 2399 2400 scsi_adjust_queue_depth(sdev, 0, qdepth); 2401 return sdev->queue_depth; 2402} 2403 2404/** 2405 * ibmvfc_change_queue_type - Change the device's queue type 2406 * @sdev: scsi device struct 2407 * @tag_type: type of tags to use 2408 * 2409 * Return value: 2410 * actual queue type set 2411 **/ 2412static int ibmvfc_change_queue_type(struct scsi_device *sdev, int tag_type) 2413{ 2414 if (sdev->tagged_supported) { 2415 scsi_set_tag_type(sdev, tag_type); 2416 2417 if (tag_type) 2418 scsi_activate_tcq(sdev, sdev->queue_depth); 2419 else 2420 scsi_deactivate_tcq(sdev, sdev->queue_depth); 2421 } else 2422 tag_type = 0; 2423 2424 return tag_type; 2425} 2426 2427static ssize_t ibmvfc_show_host_partition_name(struct device *dev, 2428 struct device_attribute *attr, char *buf) 2429{ 2430 struct Scsi_Host *shost = class_to_shost(dev); 2431 struct ibmvfc_host *vhost = shost_priv(shost); 2432 2433 return snprintf(buf, PAGE_SIZE, "%s\n", 2434 vhost->login_buf->resp.partition_name); 2435} 2436 2437static struct device_attribute ibmvfc_host_partition_name = { 2438 .attr = { 2439 .name = "partition_name", 2440 .mode = S_IRUGO, 2441 }, 2442 .show = ibmvfc_show_host_partition_name, 2443}; 2444 2445static ssize_t ibmvfc_show_host_device_name(struct device *dev, 2446 struct device_attribute *attr, char *buf) 2447{ 2448 struct Scsi_Host *shost = class_to_shost(dev); 2449 struct ibmvfc_host *vhost = shost_priv(shost); 2450 2451 return snprintf(buf, PAGE_SIZE, "%s\n", 2452 vhost->login_buf->resp.device_name); 2453} 2454 2455static struct device_attribute ibmvfc_host_device_name = { 2456 .attr = { 2457 .name = "device_name", 2458 .mode = S_IRUGO, 2459 }, 2460 .show = ibmvfc_show_host_device_name, 2461}; 2462 2463static ssize_t ibmvfc_show_host_loc_code(struct device *dev, 2464 struct device_attribute *attr, char *buf) 2465{ 2466 struct Scsi_Host *shost = class_to_shost(dev); 2467 struct ibmvfc_host *vhost = shost_priv(shost); 2468 2469 return snprintf(buf, PAGE_SIZE, "%s\n", 2470 vhost->login_buf->resp.port_loc_code); 2471} 2472 2473static struct device_attribute ibmvfc_host_loc_code = { 2474 .attr = { 2475 .name = "port_loc_code", 2476 .mode = S_IRUGO, 2477 }, 2478 .show = ibmvfc_show_host_loc_code, 2479}; 2480 2481static ssize_t ibmvfc_show_host_drc_name(struct device *dev, 2482 struct device_attribute *attr, char *buf) 2483{ 2484 struct Scsi_Host *shost = class_to_shost(dev); 2485 struct ibmvfc_host *vhost = shost_priv(shost); 2486 2487 return snprintf(buf, PAGE_SIZE, "%s\n", 2488 vhost->login_buf->resp.drc_name); 2489} 2490 2491static struct device_attribute ibmvfc_host_drc_name = { 2492 .attr = { 2493 .name = "drc_name", 2494 .mode = S_IRUGO, 2495 }, 2496 .show = ibmvfc_show_host_drc_name, 2497}; 2498 2499static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, 2500 struct device_attribute *attr, char *buf) 2501{ 2502 struct Scsi_Host *shost = class_to_shost(dev); 2503 struct ibmvfc_host *vhost = shost_priv(shost); 2504 return snprintf(buf, PAGE_SIZE, "%d\n", vhost->login_buf->resp.version); 2505} 2506 2507static struct device_attribute ibmvfc_host_npiv_version = { 2508 .attr = { 2509 .name = "npiv_version", 2510 .mode = S_IRUGO, 2511 }, 2512 .show = ibmvfc_show_host_npiv_version, 2513}; 2514 2515/** 2516 * ibmvfc_show_log_level - Show the adapter's error logging level 2517 * @dev: class device struct 2518 * @buf: buffer 2519 * 2520 * Return value: 2521 * number of bytes printed to buffer 2522 **/ 2523static ssize_t ibmvfc_show_log_level(struct device *dev, 2524 struct device_attribute *attr, char *buf) 2525{ 2526 struct Scsi_Host *shost = class_to_shost(dev); 2527 struct ibmvfc_host *vhost = shost_priv(shost); 2528 unsigned long flags = 0; 2529 int len; 2530 2531 spin_lock_irqsave(shost->host_lock, flags); 2532 len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); 2533 spin_unlock_irqrestore(shost->host_lock, flags); 2534 return len; 2535} 2536 2537/** 2538 * ibmvfc_store_log_level - Change the adapter's error logging level 2539 * @dev: class device struct 2540 * @buf: buffer 2541 * 2542 * Return value: 2543 * number of bytes printed to buffer 2544 **/ 2545static ssize_t ibmvfc_store_log_level(struct device *dev, 2546 struct device_attribute *attr, 2547 const char *buf, size_t count) 2548{ 2549 struct Scsi_Host *shost = class_to_shost(dev); 2550 struct ibmvfc_host *vhost = shost_priv(shost); 2551 unsigned long flags = 0; 2552 2553 spin_lock_irqsave(shost->host_lock, flags); 2554 vhost->log_level = simple_strtoul(buf, NULL, 10); 2555 spin_unlock_irqrestore(shost->host_lock, flags); 2556 return strlen(buf); 2557} 2558 2559static struct device_attribute ibmvfc_log_level_attr = { 2560 .attr = { 2561 .name = "log_level", 2562 .mode = S_IRUGO | S_IWUSR, 2563 }, 2564 .show = ibmvfc_show_log_level, 2565 .store = ibmvfc_store_log_level 2566}; 2567 2568#ifdef CONFIG_SCSI_IBMVFC_TRACE 2569/** 2570 * ibmvfc_read_trace - Dump the adapter trace 2571 * @kobj: kobject struct 2572 * @bin_attr: bin_attribute struct 2573 * @buf: buffer 2574 * @off: offset 2575 * @count: buffer size 2576 * 2577 * Return value: 2578 * number of bytes printed to buffer 2579 **/ 2580static ssize_t ibmvfc_read_trace(struct kobject *kobj, 2581 struct bin_attribute *bin_attr, 2582 char *buf, loff_t off, size_t count) 2583{ 2584 struct device *dev = container_of(kobj, struct device, kobj); 2585 struct Scsi_Host *shost = class_to_shost(dev); 2586 struct ibmvfc_host *vhost = shost_priv(shost); 2587 unsigned long flags = 0; 2588 int size = IBMVFC_TRACE_SIZE; 2589 char *src = (char *)vhost->trace; 2590 2591 if (off > size) 2592 return 0; 2593 if (off + count > size) { 2594 size -= off; 2595 count = size; 2596 } 2597 2598 spin_lock_irqsave(shost->host_lock, flags); 2599 memcpy(buf, &src[off], count); 2600 spin_unlock_irqrestore(shost->host_lock, flags); 2601 return count; 2602} 2603 2604static struct bin_attribute ibmvfc_trace_attr = { 2605 .attr = { 2606 .name = "trace", 2607 .mode = S_IRUGO, 2608 }, 2609 .size = 0, 2610 .read = ibmvfc_read_trace, 2611}; 2612#endif 2613 2614static struct device_attribute *ibmvfc_attrs[] = { 2615 &ibmvfc_host_partition_name, 2616 &ibmvfc_host_device_name, 2617 &ibmvfc_host_loc_code, 2618 &ibmvfc_host_drc_name, 2619 &ibmvfc_host_npiv_version, 2620 &ibmvfc_log_level_attr, 2621 NULL 2622}; 2623 2624static struct scsi_host_template driver_template = { 2625 .module = THIS_MODULE, 2626 .name = "IBM POWER Virtual FC Adapter", 2627 .proc_name = IBMVFC_NAME, 2628 .queuecommand = ibmvfc_queuecommand, 2629 .eh_abort_handler = ibmvfc_eh_abort_handler, 2630 .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, 2631 .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, 2632 .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, 2633 .slave_alloc = ibmvfc_slave_alloc, 2634 .slave_configure = ibmvfc_slave_configure, 2635 .target_alloc = ibmvfc_target_alloc, 2636 .scan_finished = ibmvfc_scan_finished, 2637 .change_queue_depth = ibmvfc_change_queue_depth, 2638 .change_queue_type = ibmvfc_change_queue_type, 2639 .cmd_per_lun = 16, 2640 .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, 2641 .this_id = -1, 2642 .sg_tablesize = SG_ALL, 2643 .max_sectors = IBMVFC_MAX_SECTORS, 2644 .use_clustering = ENABLE_CLUSTERING, 2645 .shost_attrs = ibmvfc_attrs, 2646}; 2647 2648/** 2649 * ibmvfc_next_async_crq - Returns the next entry in async queue 2650 * @vhost: ibmvfc host struct 2651 * 2652 * Returns: 2653 * Pointer to next entry in queue / NULL if empty 2654 **/ 2655static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) 2656{ 2657 struct ibmvfc_async_crq_queue *async_crq = &vhost->async_crq; 2658 struct ibmvfc_async_crq *crq; 2659 2660 crq = &async_crq->msgs[async_crq->cur]; 2661 if (crq->valid & 0x80) { 2662 if (++async_crq->cur == async_crq->size) 2663 async_crq->cur = 0; 2664 } else 2665 crq = NULL; 2666 2667 return crq; 2668} 2669 2670/** 2671 * ibmvfc_next_crq - Returns the next entry in message queue 2672 * @vhost: ibmvfc host struct 2673 * 2674 * Returns: 2675 * Pointer to next entry in queue / NULL if empty 2676 **/ 2677static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) 2678{ 2679 struct ibmvfc_crq_queue *queue = &vhost->crq; 2680 struct ibmvfc_crq *crq; 2681 2682 crq = &queue->msgs[queue->cur]; 2683 if (crq->valid & 0x80) { 2684 if (++queue->cur == queue->size) 2685 queue->cur = 0; 2686 } else 2687 crq = NULL; 2688 2689 return crq; 2690} 2691 2692/** 2693 * ibmvfc_interrupt - Interrupt handler 2694 * @irq: number of irq to handle, not used 2695 * @dev_instance: ibmvfc_host that received interrupt 2696 * 2697 * Returns: 2698 * IRQ_HANDLED 2699 **/ 2700static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) 2701{ 2702 struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; 2703 unsigned long flags; 2704 2705 spin_lock_irqsave(vhost->host->host_lock, flags); 2706 vio_disable_interrupts(to_vio_dev(vhost->dev)); 2707 tasklet_schedule(&vhost->tasklet); 2708 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2709 return IRQ_HANDLED; 2710} 2711 2712/** 2713 * ibmvfc_tasklet - Interrupt handler tasklet 2714 * @data: ibmvfc host struct 2715 * 2716 * Returns: 2717 * Nothing 2718 **/ 2719static void ibmvfc_tasklet(void *data) 2720{ 2721 struct ibmvfc_host *vhost = data; 2722 struct vio_dev *vdev = to_vio_dev(vhost->dev); 2723 struct ibmvfc_crq *crq; 2724 struct ibmvfc_async_crq *async; 2725 unsigned long flags; 2726 int done = 0; 2727 2728 spin_lock_irqsave(vhost->host->host_lock, flags); 2729 while (!done) { 2730 /* Pull all the valid messages off the CRQ */ 2731 while ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2732 ibmvfc_handle_crq(crq, vhost); 2733 crq->valid = 0; 2734 } 2735 2736 /* Pull all the valid messages off the async CRQ */ 2737 while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2738 ibmvfc_handle_async(async, vhost); 2739 async->valid = 0; 2740 } 2741 2742 vio_enable_interrupts(vdev); 2743 if ((crq = ibmvfc_next_crq(vhost)) != NULL) { 2744 vio_disable_interrupts(vdev); 2745 ibmvfc_handle_crq(crq, vhost); 2746 crq->valid = 0; 2747 } else if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { 2748 vio_disable_interrupts(vdev); 2749 ibmvfc_handle_async(async, vhost); 2750 async->valid = 0; 2751 } else 2752 done = 1; 2753 } 2754 2755 spin_unlock_irqrestore(vhost->host->host_lock, flags); 2756} 2757 2758/** 2759 * ibmvfc_init_tgt - Set the next init job step for the target 2760 * @tgt: ibmvfc target struct 2761 * @job_step: job step to perform 2762 * 2763 **/ 2764static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, 2765 void (*job_step) (struct ibmvfc_target *)) 2766{ 2767 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT); 2768 tgt->job_step = job_step; 2769 wake_up(&tgt->vhost->work_wait_q); 2770} 2771 2772/** 2773 * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization 2774 * @tgt: ibmvfc target struct 2775 * @job_step: initialization job step 2776 * 2777 **/ 2778static void ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, 2779 void (*job_step) (struct ibmvfc_target *)) 2780{ 2781 if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { 2782 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2783 wake_up(&tgt->vhost->work_wait_q); 2784 } else 2785 ibmvfc_init_tgt(tgt, job_step); 2786} 2787 2788/* Defined in FC-LS */ 2789static const struct { 2790 int code; 2791 int retry; 2792 int logged_in; 2793} prli_rsp [] = { 2794 { 0, 1, 0 }, 2795 { 1, 0, 1 }, 2796 { 2, 1, 0 }, 2797 { 3, 1, 0 }, 2798 { 4, 0, 0 }, 2799 { 5, 0, 0 }, 2800 { 6, 0, 1 }, 2801 { 7, 0, 0 }, 2802 { 8, 1, 0 }, 2803}; 2804 2805/** 2806 * ibmvfc_get_prli_rsp - Find PRLI response index 2807 * @flags: PRLI response flags 2808 * 2809 **/ 2810static int ibmvfc_get_prli_rsp(u16 flags) 2811{ 2812 int i; 2813 int code = (flags & 0x0f00) >> 8; 2814 2815 for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) 2816 if (prli_rsp[i].code == code) 2817 return i; 2818 2819 return 0; 2820} 2821 2822/** 2823 * ibmvfc_tgt_prli_done - Completion handler for Process Login 2824 * @evt: ibmvfc event struct 2825 * 2826 **/ 2827static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) 2828{ 2829 struct ibmvfc_target *tgt = evt->tgt; 2830 struct ibmvfc_host *vhost = evt->vhost; 2831 struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; 2832 struct ibmvfc_prli_svc_parms *parms = &rsp->parms; 2833 u32 status = rsp->common.status; 2834 int index; 2835 2836 vhost->discovery_threads--; 2837 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2838 switch (status) { 2839 case IBMVFC_MAD_SUCCESS: 2840 tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", 2841 parms->type, parms->flags, parms->service_parms); 2842 2843 if (parms->type == IBMVFC_SCSI_FCP_TYPE) { 2844 index = ibmvfc_get_prli_rsp(parms->flags); 2845 if (prli_rsp[index].logged_in) { 2846 if (parms->flags & IBMVFC_PRLI_EST_IMG_PAIR) { 2847 tgt->need_login = 0; 2848 tgt->ids.roles = 0; 2849 if (parms->service_parms & IBMVFC_PRLI_TARGET_FUNC) 2850 tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; 2851 if (parms->service_parms & IBMVFC_PRLI_INITIATOR_FUNC) 2852 tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; 2853 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_ADD_RPORT); 2854 } else 2855 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2856 } else if (prli_rsp[index].retry) 2857 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2858 else 2859 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2860 } else 2861 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2862 break; 2863 case IBMVFC_MAD_DRIVER_FAILED: 2864 break; 2865 case IBMVFC_MAD_CRQ_ERROR: 2866 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2867 break; 2868 case IBMVFC_MAD_FAILED: 2869 default: 2870 tgt_err(tgt, "Process Login failed: %s (%x:%x) rc=0x%02X\n", 2871 ibmvfc_get_cmd_error(rsp->status, rsp->error), 2872 rsp->status, rsp->error, status); 2873 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2874 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); 2875 else 2876 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2877 break; 2878 }; 2879 2880 kref_put(&tgt->kref, ibmvfc_release_tgt); 2881 ibmvfc_free_event(evt); 2882 wake_up(&vhost->work_wait_q); 2883} 2884 2885/** 2886 * ibmvfc_tgt_send_prli - Send a process login 2887 * @tgt: ibmvfc target struct 2888 * 2889 **/ 2890static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) 2891{ 2892 struct ibmvfc_process_login *prli; 2893 struct ibmvfc_host *vhost = tgt->vhost; 2894 struct ibmvfc_event *evt; 2895 2896 if (vhost->discovery_threads >= disc_threads) 2897 return; 2898 2899 kref_get(&tgt->kref); 2900 evt = ibmvfc_get_event(vhost); 2901 vhost->discovery_threads++; 2902 ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); 2903 evt->tgt = tgt; 2904 prli = &evt->iu.prli; 2905 memset(prli, 0, sizeof(*prli)); 2906 prli->common.version = 1; 2907 prli->common.opcode = IBMVFC_PROCESS_LOGIN; 2908 prli->common.length = sizeof(*prli); 2909 prli->scsi_id = tgt->scsi_id; 2910 2911 prli->parms.type = IBMVFC_SCSI_FCP_TYPE; 2912 prli->parms.flags = IBMVFC_PRLI_EST_IMG_PAIR; 2913 prli->parms.service_parms = IBMVFC_PRLI_INITIATOR_FUNC; 2914 2915 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2916 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 2917 vhost->discovery_threads--; 2918 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2919 kref_put(&tgt->kref, ibmvfc_release_tgt); 2920 } else 2921 tgt_dbg(tgt, "Sent process login\n"); 2922} 2923 2924/** 2925 * ibmvfc_tgt_plogi_done - Completion handler for Port Login 2926 * @evt: ibmvfc event struct 2927 * 2928 **/ 2929static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) 2930{ 2931 struct ibmvfc_target *tgt = evt->tgt; 2932 struct ibmvfc_host *vhost = evt->vhost; 2933 struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; 2934 u32 status = rsp->common.status; 2935 2936 vhost->discovery_threads--; 2937 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 2938 switch (status) { 2939 case IBMVFC_MAD_SUCCESS: 2940 tgt_dbg(tgt, "Port Login succeeded\n"); 2941 if (tgt->ids.port_name && 2942 tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { 2943 vhost->reinit = 1; 2944 tgt_dbg(tgt, "Port re-init required\n"); 2945 break; 2946 } 2947 tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); 2948 tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); 2949 tgt->ids.port_id = tgt->scsi_id; 2950 memcpy(&tgt->service_parms, &rsp->service_parms, 2951 sizeof(tgt->service_parms)); 2952 memcpy(&tgt->service_parms_change, &rsp->service_parms_change, 2953 sizeof(tgt->service_parms_change)); 2954 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); 2955 break; 2956 case IBMVFC_MAD_DRIVER_FAILED: 2957 break; 2958 case IBMVFC_MAD_CRQ_ERROR: 2959 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2960 break; 2961 case IBMVFC_MAD_FAILED: 2962 default: 2963 tgt_err(tgt, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 2964 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 2965 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 2966 ibmvfc_get_ls_explain(rsp->fc_explain), rsp->fc_explain, status); 2967 2968 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 2969 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); 2970 else 2971 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 2972 break; 2973 }; 2974 2975 kref_put(&tgt->kref, ibmvfc_release_tgt); 2976 ibmvfc_free_event(evt); 2977 wake_up(&vhost->work_wait_q); 2978} 2979 2980/** 2981 * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target 2982 * @tgt: ibmvfc target struct 2983 * 2984 **/ 2985static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) 2986{ 2987 struct ibmvfc_port_login *plogi; 2988 struct ibmvfc_host *vhost = tgt->vhost; 2989 struct ibmvfc_event *evt; 2990 2991 if (vhost->discovery_threads >= disc_threads) 2992 return; 2993 2994 kref_get(&tgt->kref); 2995 evt = ibmvfc_get_event(vhost); 2996 vhost->discovery_threads++; 2997 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 2998 ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); 2999 evt->tgt = tgt; 3000 plogi = &evt->iu.plogi; 3001 memset(plogi, 0, sizeof(*plogi)); 3002 plogi->common.version = 1; 3003 plogi->common.opcode = IBMVFC_PORT_LOGIN; 3004 plogi->common.length = sizeof(*plogi); 3005 plogi->scsi_id = tgt->scsi_id; 3006 3007 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3008 vhost->discovery_threads--; 3009 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3010 kref_put(&tgt->kref, ibmvfc_release_tgt); 3011 } else 3012 tgt_dbg(tgt, "Sent port login\n"); 3013} 3014 3015/** 3016 * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD 3017 * @evt: ibmvfc event struct 3018 * 3019 **/ 3020static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) 3021{ 3022 struct ibmvfc_target *tgt = evt->tgt; 3023 struct ibmvfc_host *vhost = evt->vhost; 3024 struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; 3025 u32 status = rsp->common.status; 3026 3027 vhost->discovery_threads--; 3028 ibmvfc_free_event(evt); 3029 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3030 3031 switch (status) { 3032 case IBMVFC_MAD_SUCCESS: 3033 tgt_dbg(tgt, "Implicit Logout succeeded\n"); 3034 break; 3035 case IBMVFC_MAD_DRIVER_FAILED: 3036 kref_put(&tgt->kref, ibmvfc_release_tgt); 3037 wake_up(&vhost->work_wait_q); 3038 return; 3039 case IBMVFC_MAD_FAILED: 3040 default: 3041 tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); 3042 break; 3043 }; 3044 3045 if (vhost->action == IBMVFC_HOST_ACTION_TGT_INIT) 3046 ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); 3047 else if (vhost->action == IBMVFC_HOST_ACTION_QUERY_TGTS && 3048 tgt->scsi_id != tgt->new_scsi_id) 3049 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3050 kref_put(&tgt->kref, ibmvfc_release_tgt); 3051 wake_up(&vhost->work_wait_q); 3052} 3053 3054/** 3055 * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target 3056 * @tgt: ibmvfc target struct 3057 * 3058 **/ 3059static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) 3060{ 3061 struct ibmvfc_implicit_logout *mad; 3062 struct ibmvfc_host *vhost = tgt->vhost; 3063 struct ibmvfc_event *evt; 3064 3065 if (vhost->discovery_threads >= disc_threads) 3066 return; 3067 3068 kref_get(&tgt->kref); 3069 evt = ibmvfc_get_event(vhost); 3070 vhost->discovery_threads++; 3071 ibmvfc_init_event(evt, ibmvfc_tgt_implicit_logout_done, IBMVFC_MAD_FORMAT); 3072 evt->tgt = tgt; 3073 mad = &evt->iu.implicit_logout; 3074 memset(mad, 0, sizeof(*mad)); 3075 mad->common.version = 1; 3076 mad->common.opcode = IBMVFC_IMPLICIT_LOGOUT; 3077 mad->common.length = sizeof(*mad); 3078 mad->old_scsi_id = tgt->scsi_id; 3079 3080 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3081 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3082 vhost->discovery_threads--; 3083 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3084 kref_put(&tgt->kref, ibmvfc_release_tgt); 3085 } else 3086 tgt_dbg(tgt, "Sent Implicit Logout\n"); 3087} 3088 3089/** 3090 * ibmvfc_adisc_needs_plogi - Does device need PLOGI? 3091 * @mad: ibmvfc passthru mad struct 3092 * @tgt: ibmvfc target struct 3093 * 3094 * Returns: 3095 * 1 if PLOGI needed / 0 if PLOGI not needed 3096 **/ 3097static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, 3098 struct ibmvfc_target *tgt) 3099{ 3100 if (memcmp(&mad->fc_iu.response[2], &tgt->ids.port_name, 3101 sizeof(tgt->ids.port_name))) 3102 return 1; 3103 if (memcmp(&mad->fc_iu.response[4], &tgt->ids.node_name, 3104 sizeof(tgt->ids.node_name))) 3105 return 1; 3106 if (mad->fc_iu.response[6] != tgt->scsi_id) 3107 return 1; 3108 return 0; 3109} 3110 3111/** 3112 * ibmvfc_tgt_adisc_done - Completion handler for ADISC 3113 * @evt: ibmvfc event struct 3114 * 3115 **/ 3116static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) 3117{ 3118 struct ibmvfc_target *tgt = evt->tgt; 3119 struct ibmvfc_host *vhost = evt->vhost; 3120 struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; 3121 u32 status = mad->common.status; 3122 u8 fc_reason, fc_explain; 3123 3124 vhost->discovery_threads--; 3125 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3126 3127 switch (status) { 3128 case IBMVFC_MAD_SUCCESS: 3129 tgt_dbg(tgt, "ADISC succeeded\n"); 3130 if (ibmvfc_adisc_needs_plogi(mad, tgt)) 3131 tgt->need_login = 1; 3132 break; 3133 case IBMVFC_MAD_DRIVER_FAILED: 3134 break; 3135 case IBMVFC_MAD_FAILED: 3136 default: 3137 tgt->need_login = 1; 3138 fc_reason = (mad->fc_iu.response[1] & 0x00ff0000) >> 16; 3139 fc_explain = (mad->fc_iu.response[1] & 0x0000ff00) >> 8; 3140 tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3141 ibmvfc_get_cmd_error(mad->iu.status, mad->iu.error), 3142 mad->iu.status, mad->iu.error, 3143 ibmvfc_get_fc_type(fc_reason), fc_reason, 3144 ibmvfc_get_ls_explain(fc_explain), fc_explain, status); 3145 break; 3146 }; 3147 3148 kref_put(&tgt->kref, ibmvfc_release_tgt); 3149 ibmvfc_free_event(evt); 3150 wake_up(&vhost->work_wait_q); 3151} 3152 3153/** 3154 * ibmvfc_init_passthru - Initialize an event struct for FC passthru 3155 * @evt: ibmvfc event struct 3156 * 3157 **/ 3158static void ibmvfc_init_passthru(struct ibmvfc_event *evt) 3159{ 3160 struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; 3161 3162 memset(mad, 0, sizeof(*mad)); 3163 mad->common.version = 1; 3164 mad->common.opcode = IBMVFC_PASSTHRU; 3165 mad->common.length = sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu); 3166 mad->cmd_ioba.va = (u64)evt->crq.ioba + 3167 offsetof(struct ibmvfc_passthru_mad, iu); 3168 mad->cmd_ioba.len = sizeof(mad->iu); 3169 mad->iu.cmd_len = sizeof(mad->fc_iu.payload); 3170 mad->iu.rsp_len = sizeof(mad->fc_iu.response); 3171 mad->iu.cmd.va = (u64)evt->crq.ioba + 3172 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3173 offsetof(struct ibmvfc_passthru_fc_iu, payload); 3174 mad->iu.cmd.len = sizeof(mad->fc_iu.payload); 3175 mad->iu.rsp.va = (u64)evt->crq.ioba + 3176 offsetof(struct ibmvfc_passthru_mad, fc_iu) + 3177 offsetof(struct ibmvfc_passthru_fc_iu, response); 3178 mad->iu.rsp.len = sizeof(mad->fc_iu.response); 3179} 3180 3181/** 3182 * ibmvfc_tgt_adisc - Initiate an ADISC for specified target 3183 * @tgt: ibmvfc target struct 3184 * 3185 **/ 3186static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) 3187{ 3188 struct ibmvfc_passthru_mad *mad; 3189 struct ibmvfc_host *vhost = tgt->vhost; 3190 struct ibmvfc_event *evt; 3191 3192 if (vhost->discovery_threads >= disc_threads) 3193 return; 3194 3195 kref_get(&tgt->kref); 3196 evt = ibmvfc_get_event(vhost); 3197 vhost->discovery_threads++; 3198 ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); 3199 evt->tgt = tgt; 3200 3201 ibmvfc_init_passthru(evt); 3202 mad = &evt->iu.passthru; 3203 mad->iu.flags = IBMVFC_FC_ELS; 3204 mad->iu.scsi_id = tgt->scsi_id; 3205 3206 mad->fc_iu.payload[0] = IBMVFC_ADISC; 3207 memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, 3208 sizeof(vhost->login_buf->resp.port_name)); 3209 memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, 3210 sizeof(vhost->login_buf->resp.node_name)); 3211 mad->fc_iu.payload[6] = vhost->login_buf->resp.scsi_id & 0x00ffffff; 3212 3213 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3214 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3215 vhost->discovery_threads--; 3216 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3217 kref_put(&tgt->kref, ibmvfc_release_tgt); 3218 } else 3219 tgt_dbg(tgt, "Sent ADISC\n"); 3220} 3221 3222/** 3223 * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD 3224 * @evt: ibmvfc event struct 3225 * 3226 **/ 3227static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) 3228{ 3229 struct ibmvfc_target *tgt = evt->tgt; 3230 struct ibmvfc_host *vhost = evt->vhost; 3231 struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; 3232 u32 status = rsp->common.status; 3233 3234 vhost->discovery_threads--; 3235 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3236 switch (status) { 3237 case IBMVFC_MAD_SUCCESS: 3238 tgt_dbg(tgt, "Query Target succeeded\n"); 3239 tgt->new_scsi_id = rsp->scsi_id; 3240 if (rsp->scsi_id != tgt->scsi_id) 3241 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3242 else 3243 ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); 3244 break; 3245 case IBMVFC_MAD_DRIVER_FAILED: 3246 break; 3247 case IBMVFC_MAD_CRQ_ERROR: 3248 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3249 break; 3250 case IBMVFC_MAD_FAILED: 3251 default: 3252 tgt_err(tgt, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", 3253 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error, 3254 ibmvfc_get_fc_type(rsp->fc_type), rsp->fc_type, 3255 ibmvfc_get_gs_explain(rsp->fc_explain), rsp->fc_explain, status); 3256 3257 if ((rsp->status & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && 3258 rsp->error == IBMVFC_UNABLE_TO_PERFORM_REQ && 3259 rsp->fc_explain == IBMVFC_PORT_NAME_NOT_REG) 3260 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3261 else if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3262 ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); 3263 else 3264 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); 3265 break; 3266 }; 3267 3268 kref_put(&tgt->kref, ibmvfc_release_tgt); 3269 ibmvfc_free_event(evt); 3270 wake_up(&vhost->work_wait_q); 3271} 3272 3273/** 3274 * ibmvfc_tgt_query_target - Initiate a Query Target for specified target 3275 * @tgt: ibmvfc target struct 3276 * 3277 **/ 3278static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) 3279{ 3280 struct ibmvfc_query_tgt *query_tgt; 3281 struct ibmvfc_host *vhost = tgt->vhost; 3282 struct ibmvfc_event *evt; 3283 3284 if (vhost->discovery_threads >= disc_threads) 3285 return; 3286 3287 kref_get(&tgt->kref); 3288 evt = ibmvfc_get_event(vhost); 3289 vhost->discovery_threads++; 3290 evt->tgt = tgt; 3291 ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); 3292 query_tgt = &evt->iu.query_tgt; 3293 memset(query_tgt, 0, sizeof(*query_tgt)); 3294 query_tgt->common.version = 1; 3295 query_tgt->common.opcode = IBMVFC_QUERY_TARGET; 3296 query_tgt->common.length = sizeof(*query_tgt); 3297 query_tgt->wwpn = tgt->ids.port_name; 3298 3299 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); 3300 if (ibmvfc_send_event(evt, vhost, default_timeout)) { 3301 vhost->discovery_threads--; 3302 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3303 kref_put(&tgt->kref, ibmvfc_release_tgt); 3304 } else 3305 tgt_dbg(tgt, "Sent Query Target\n"); 3306} 3307 3308/** 3309 * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target 3310 * @vhost: ibmvfc host struct 3311 * @scsi_id: SCSI ID to allocate target for 3312 * 3313 * Returns: 3314 * 0 on success / other on failure 3315 **/ 3316static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id) 3317{ 3318 struct ibmvfc_target *tgt; 3319 unsigned long flags; 3320 3321 spin_lock_irqsave(vhost->host->host_lock, flags); 3322 list_for_each_entry(tgt, &vhost->targets, queue) { 3323 if (tgt->scsi_id == scsi_id) { 3324 if (tgt->need_login) 3325 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3326 goto unlock_out; 3327 } 3328 } 3329 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3330 3331 tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL); 3332 if (!tgt) { 3333 dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n", 3334 scsi_id); 3335 return -ENOMEM; 3336 } 3337 3338 memset(tgt, 0, sizeof(*tgt)); 3339 tgt->scsi_id = scsi_id; 3340 tgt->new_scsi_id = scsi_id; 3341 tgt->vhost = vhost; 3342 tgt->need_login = 1; 3343 kref_init(&tgt->kref); 3344 ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); 3345 spin_lock_irqsave(vhost->host->host_lock, flags); 3346 list_add_tail(&tgt->queue, &vhost->targets); 3347 3348unlock_out: 3349 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3350 return 0; 3351} 3352 3353/** 3354 * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets 3355 * @vhost: ibmvfc host struct 3356 * 3357 * Returns: 3358 * 0 on success / other on failure 3359 **/ 3360static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) 3361{ 3362 int i, rc; 3363 3364 for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) 3365 rc = ibmvfc_alloc_target(vhost, 3366 vhost->disc_buf->scsi_id[i] & IBMVFC_DISC_TGT_SCSI_ID_MASK); 3367 3368 return rc; 3369} 3370 3371/** 3372 * ibmvfc_discover_targets_done - Completion handler for discover targets MAD 3373 * @evt: ibmvfc event struct 3374 * 3375 **/ 3376static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) 3377{ 3378 struct ibmvfc_host *vhost = evt->vhost; 3379 struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; 3380 u32 mad_status = rsp->common.status; 3381 3382 switch (mad_status) { 3383 case IBMVFC_MAD_SUCCESS: 3384 ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); 3385 vhost->num_targets = rsp->num_written; 3386 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); 3387 break; 3388 case IBMVFC_MAD_FAILED: 3389 dev_err(vhost->dev, "Discover Targets failed: %s (%x:%x)\n", 3390 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3391 ibmvfc_retry_host_init(vhost); 3392 break; 3393 case IBMVFC_MAD_DRIVER_FAILED: 3394 break; 3395 default: 3396 dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); 3397 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3398 break; 3399 } 3400 3401 ibmvfc_free_event(evt); 3402 wake_up(&vhost->work_wait_q); 3403} 3404 3405/** 3406 * ibmvfc_discover_targets - Send Discover Targets MAD 3407 * @vhost: ibmvfc host struct 3408 * 3409 **/ 3410static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) 3411{ 3412 struct ibmvfc_discover_targets *mad; 3413 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3414 3415 ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); 3416 mad = &evt->iu.discover_targets; 3417 memset(mad, 0, sizeof(*mad)); 3418 mad->common.version = 1; 3419 mad->common.opcode = IBMVFC_DISC_TARGETS; 3420 mad->common.length = sizeof(*mad); 3421 mad->bufflen = vhost->disc_buf_sz; 3422 mad->buffer.va = vhost->disc_buf_dma; 3423 mad->buffer.len = vhost->disc_buf_sz; 3424 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3425 3426 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3427 ibmvfc_dbg(vhost, "Sent discover targets\n"); 3428 else 3429 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3430} 3431 3432/** 3433 * ibmvfc_npiv_login_done - Completion handler for NPIV Login 3434 * @evt: ibmvfc event struct 3435 * 3436 **/ 3437static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) 3438{ 3439 struct ibmvfc_host *vhost = evt->vhost; 3440 u32 mad_status = evt->xfer_iu->npiv_login.common.status; 3441 struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; 3442 unsigned int npiv_max_sectors; 3443 3444 switch (mad_status) { 3445 case IBMVFC_MAD_SUCCESS: 3446 ibmvfc_free_event(evt); 3447 break; 3448 case IBMVFC_MAD_FAILED: 3449 dev_err(vhost->dev, "NPIV Login failed: %s (%x:%x)\n", 3450 ibmvfc_get_cmd_error(rsp->status, rsp->error), rsp->status, rsp->error); 3451 if (ibmvfc_retry_cmd(rsp->status, rsp->error)) 3452 ibmvfc_retry_host_init(vhost); 3453 else 3454 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3455 ibmvfc_free_event(evt); 3456 return; 3457 case IBMVFC_MAD_CRQ_ERROR: 3458 ibmvfc_retry_host_init(vhost); 3459 case IBMVFC_MAD_DRIVER_FAILED: 3460 ibmvfc_free_event(evt); 3461 return; 3462 default: 3463 dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); 3464 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3465 ibmvfc_free_event(evt); 3466 return; 3467 } 3468 3469 vhost->client_migrated = 0; 3470 3471 if (!(rsp->flags & IBMVFC_NATIVE_FC)) { 3472 dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", 3473 rsp->flags); 3474 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3475 wake_up(&vhost->work_wait_q); 3476 return; 3477 } 3478 3479 if (rsp->max_cmds <= IBMVFC_NUM_INTERNAL_REQ) { 3480 dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", 3481 rsp->max_cmds); 3482 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3483 wake_up(&vhost->work_wait_q); 3484 return; 3485 } 3486 3487 npiv_max_sectors = min((uint)(rsp->max_dma_len >> 9), IBMVFC_MAX_SECTORS); 3488 dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", 3489 rsp->partition_name, rsp->device_name, rsp->port_loc_code, 3490 rsp->drc_name, npiv_max_sectors); 3491 3492 fc_host_fabric_name(vhost->host) = rsp->node_name; 3493 fc_host_node_name(vhost->host) = rsp->node_name; 3494 fc_host_port_name(vhost->host) = rsp->port_name; 3495 fc_host_port_id(vhost->host) = rsp->scsi_id; 3496 fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; 3497 fc_host_supported_classes(vhost->host) = 0; 3498 if (rsp->service_parms.class1_parms[0] & 0x80000000) 3499 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; 3500 if (rsp->service_parms.class2_parms[0] & 0x80000000) 3501 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; 3502 if (rsp->service_parms.class3_parms[0] & 0x80000000) 3503 fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; 3504 fc_host_maxframe_size(vhost->host) = 3505 rsp->service_parms.common.bb_rcv_sz & 0x0fff; 3506 3507 vhost->host->can_queue = rsp->max_cmds - IBMVFC_NUM_INTERNAL_REQ; 3508 vhost->host->max_sectors = npiv_max_sectors; 3509 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3510 wake_up(&vhost->work_wait_q); 3511} 3512 3513/** 3514 * ibmvfc_npiv_login - Sends NPIV login 3515 * @vhost: ibmvfc host struct 3516 * 3517 **/ 3518static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) 3519{ 3520 struct ibmvfc_npiv_login_mad *mad; 3521 struct ibmvfc_event *evt = ibmvfc_get_event(vhost); 3522 3523 ibmvfc_gather_partition_info(vhost); 3524 ibmvfc_set_login_info(vhost); 3525 ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); 3526 3527 memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); 3528 mad = &evt->iu.npiv_login; 3529 memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); 3530 mad->common.version = 1; 3531 mad->common.opcode = IBMVFC_NPIV_LOGIN; 3532 mad->common.length = sizeof(struct ibmvfc_npiv_login_mad); 3533 mad->buffer.va = vhost->login_buf_dma; 3534 mad->buffer.len = sizeof(*vhost->login_buf); 3535 3536 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); 3537 3538 if (!ibmvfc_send_event(evt, vhost, default_timeout)) 3539 ibmvfc_dbg(vhost, "Sent NPIV login\n"); 3540 else 3541 ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); 3542}; 3543 3544/** 3545 * ibmvfc_dev_init_to_do - Is there target initialization work to do? 3546 * @vhost: ibmvfc host struct 3547 * 3548 * Returns: 3549 * 1 if work to do / 0 if not 3550 **/ 3551static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) 3552{ 3553 struct ibmvfc_target *tgt; 3554 3555 list_for_each_entry(tgt, &vhost->targets, queue) { 3556 if (tgt->action == IBMVFC_TGT_ACTION_INIT || 3557 tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3558 return 1; 3559 } 3560 3561 return 0; 3562} 3563 3564/** 3565 * __ibmvfc_work_to_do - Is there task level work to do? (no locking) 3566 * @vhost: ibmvfc host struct 3567 * 3568 * Returns: 3569 * 1 if work to do / 0 if not 3570 **/ 3571static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3572{ 3573 struct ibmvfc_target *tgt; 3574 3575 if (kthread_should_stop()) 3576 return 1; 3577 switch (vhost->action) { 3578 case IBMVFC_HOST_ACTION_NONE: 3579 case IBMVFC_HOST_ACTION_INIT_WAIT: 3580 return 0; 3581 case IBMVFC_HOST_ACTION_TGT_INIT: 3582 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3583 if (vhost->discovery_threads == disc_threads) 3584 return 0; 3585 list_for_each_entry(tgt, &vhost->targets, queue) 3586 if (tgt->action == IBMVFC_TGT_ACTION_INIT) 3587 return 1; 3588 list_for_each_entry(tgt, &vhost->targets, queue) 3589 if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) 3590 return 0; 3591 return 1; 3592 case IBMVFC_HOST_ACTION_INIT: 3593 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3594 case IBMVFC_HOST_ACTION_TGT_ADD: 3595 case IBMVFC_HOST_ACTION_TGT_DEL: 3596 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3597 case IBMVFC_HOST_ACTION_QUERY: 3598 default: 3599 break; 3600 }; 3601 3602 return 1; 3603} 3604 3605/** 3606 * ibmvfc_work_to_do - Is there task level work to do? 3607 * @vhost: ibmvfc host struct 3608 * 3609 * Returns: 3610 * 1 if work to do / 0 if not 3611 **/ 3612static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) 3613{ 3614 unsigned long flags; 3615 int rc; 3616 3617 spin_lock_irqsave(vhost->host->host_lock, flags); 3618 rc = __ibmvfc_work_to_do(vhost); 3619 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3620 return rc; 3621} 3622 3623/** 3624 * ibmvfc_log_ae - Log async events if necessary 3625 * @vhost: ibmvfc host struct 3626 * @events: events to log 3627 * 3628 **/ 3629static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) 3630{ 3631 if (events & IBMVFC_AE_RSCN) 3632 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); 3633 if ((events & IBMVFC_AE_LINKDOWN) && 3634 vhost->state >= IBMVFC_HALTED) 3635 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); 3636 if ((events & IBMVFC_AE_LINKUP) && 3637 vhost->state == IBMVFC_INITIALIZING) 3638 fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); 3639} 3640 3641/** 3642 * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port 3643 * @tgt: ibmvfc target struct 3644 * 3645 **/ 3646static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) 3647{ 3648 struct ibmvfc_host *vhost = tgt->vhost; 3649 struct fc_rport *rport = tgt->rport; 3650 unsigned long flags; 3651 3652 if (rport) { 3653 tgt_dbg(tgt, "Setting rport roles\n"); 3654 fc_remote_port_rolechg(rport, tgt->ids.roles); 3655 spin_lock_irqsave(vhost->host->host_lock, flags); 3656 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3657 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3658 return; 3659 } 3660 3661 tgt_dbg(tgt, "Adding rport\n"); 3662 rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); 3663 spin_lock_irqsave(vhost->host->host_lock, flags); 3664 tgt->rport = rport; 3665 ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); 3666 if (rport) { 3667 tgt_dbg(tgt, "rport add succeeded\n"); 3668 rport->maxframe_size = tgt->service_parms.common.bb_rcv_sz & 0x0fff; 3669 rport->supported_classes = 0; 3670 tgt->target_id = rport->scsi_target_id; 3671 if (tgt->service_parms.class1_parms[0] & 0x80000000) 3672 rport->supported_classes |= FC_COS_CLASS1; 3673 if (tgt->service_parms.class2_parms[0] & 0x80000000) 3674 rport->supported_classes |= FC_COS_CLASS2; 3675 if (tgt->service_parms.class3_parms[0] & 0x80000000) 3676 rport->supported_classes |= FC_COS_CLASS3; 3677 } else 3678 tgt_dbg(tgt, "rport add failed\n"); 3679 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3680} 3681 3682/** 3683 * ibmvfc_do_work - Do task level work 3684 * @vhost: ibmvfc host struct 3685 * 3686 **/ 3687static void ibmvfc_do_work(struct ibmvfc_host *vhost) 3688{ 3689 struct ibmvfc_target *tgt; 3690 unsigned long flags; 3691 struct fc_rport *rport; 3692 3693 ibmvfc_log_ae(vhost, vhost->events_to_log); 3694 spin_lock_irqsave(vhost->host->host_lock, flags); 3695 vhost->events_to_log = 0; 3696 switch (vhost->action) { 3697 case IBMVFC_HOST_ACTION_NONE: 3698 case IBMVFC_HOST_ACTION_INIT_WAIT: 3699 break; 3700 case IBMVFC_HOST_ACTION_INIT: 3701 BUG_ON(vhost->state != IBMVFC_INITIALIZING); 3702 if (vhost->delay_init) { 3703 vhost->delay_init = 0; 3704 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3705 ssleep(15); 3706 return; 3707 } else 3708 vhost->job_step(vhost); 3709 break; 3710 case IBMVFC_HOST_ACTION_QUERY: 3711 list_for_each_entry(tgt, &vhost->targets, queue) 3712 ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); 3713 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); 3714 break; 3715 case IBMVFC_HOST_ACTION_QUERY_TGTS: 3716 list_for_each_entry(tgt, &vhost->targets, queue) { 3717 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3718 tgt->job_step(tgt); 3719 break; 3720 } 3721 } 3722 3723 if (!ibmvfc_dev_init_to_do(vhost)) 3724 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); 3725 break; 3726 case IBMVFC_HOST_ACTION_TGT_DEL: 3727 case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: 3728 list_for_each_entry(tgt, &vhost->targets, queue) { 3729 if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { 3730 tgt_dbg(tgt, "Deleting rport\n"); 3731 rport = tgt->rport; 3732 tgt->rport = NULL; 3733 list_del(&tgt->queue); 3734 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3735 if (rport) 3736 fc_remote_port_delete(rport); 3737 kref_put(&tgt->kref, ibmvfc_release_tgt); 3738 return; 3739 } 3740 } 3741 3742 if (vhost->state == IBMVFC_INITIALIZING) { 3743 if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { 3744 ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); 3745 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_ADD); 3746 vhost->init_retries = 0; 3747 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3748 scsi_unblock_requests(vhost->host); 3749 return; 3750 } else { 3751 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); 3752 vhost->job_step = ibmvfc_discover_targets; 3753 } 3754 } else { 3755 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3756 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3757 scsi_unblock_requests(vhost->host); 3758 wake_up(&vhost->init_wait_q); 3759 return; 3760 } 3761 break; 3762 case IBMVFC_HOST_ACTION_ALLOC_TGTS: 3763 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); 3764 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3765 ibmvfc_alloc_targets(vhost); 3766 spin_lock_irqsave(vhost->host->host_lock, flags); 3767 break; 3768 case IBMVFC_HOST_ACTION_TGT_INIT: 3769 list_for_each_entry(tgt, &vhost->targets, queue) { 3770 if (tgt->action == IBMVFC_TGT_ACTION_INIT) { 3771 tgt->job_step(tgt); 3772 break; 3773 } 3774 } 3775 3776 if (!ibmvfc_dev_init_to_do(vhost)) 3777 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); 3778 break; 3779 case IBMVFC_HOST_ACTION_TGT_ADD: 3780 list_for_each_entry(tgt, &vhost->targets, queue) { 3781 if (tgt->action == IBMVFC_TGT_ACTION_ADD_RPORT) { 3782 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3783 ibmvfc_tgt_add_rport(tgt); 3784 return; 3785 } 3786 } 3787 3788 if (vhost->reinit && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { 3789 vhost->reinit = 0; 3790 scsi_block_requests(vhost->host); 3791 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); 3792 } else { 3793 ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); 3794 wake_up(&vhost->init_wait_q); 3795 } 3796 break; 3797 default: 3798 break; 3799 }; 3800 3801 spin_unlock_irqrestore(vhost->host->host_lock, flags); 3802} 3803 3804/** 3805 * ibmvfc_work - Do task level work 3806 * @data: ibmvfc host struct 3807 * 3808 * Returns: 3809 * zero 3810 **/ 3811static int ibmvfc_work(void *data) 3812{ 3813 struct ibmvfc_host *vhost = data; 3814 int rc; 3815 3816 set_user_nice(current, -20); 3817 3818 while (1) { 3819 rc = wait_event_interruptible(vhost->work_wait_q, 3820 ibmvfc_work_to_do(vhost)); 3821 3822 BUG_ON(rc); 3823 3824 if (kthread_should_stop()) 3825 break; 3826 3827 ibmvfc_do_work(vhost); 3828 } 3829 3830 ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); 3831 return 0; 3832} 3833 3834/** 3835 * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor 3836 * @vhost: ibmvfc host struct 3837 * 3838 * Allocates a page for messages, maps it for dma, and registers 3839 * the crq with the hypervisor. 3840 * 3841 * Return value: 3842 * zero on success / other on failure 3843 **/ 3844static int ibmvfc_init_crq(struct ibmvfc_host *vhost) 3845{ 3846 int rc, retrc = -ENOMEM; 3847 struct device *dev = vhost->dev; 3848 struct vio_dev *vdev = to_vio_dev(dev); 3849 struct ibmvfc_crq_queue *crq = &vhost->crq; 3850 3851 ENTER; 3852 crq->msgs = (struct ibmvfc_crq *)get_zeroed_page(GFP_KERNEL); 3853 3854 if (!crq->msgs) 3855 return -ENOMEM; 3856 3857 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3858 crq->msg_token = dma_map_single(dev, crq->msgs, 3859 PAGE_SIZE, DMA_BIDIRECTIONAL); 3860 3861 if (dma_mapping_error(dev, crq->msg_token)) 3862 goto map_failed; 3863 3864 retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3865 crq->msg_token, PAGE_SIZE); 3866 3867 if (rc == H_RESOURCE) 3868 /* maybe kexecing and resource is busy. try a reset */ 3869 retrc = rc = ibmvfc_reset_crq(vhost); 3870 3871 if (rc == H_CLOSED) 3872 dev_warn(dev, "Partner adapter not ready\n"); 3873 else if (rc) { 3874 dev_warn(dev, "Error %d opening adapter\n", rc); 3875 goto reg_crq_failed; 3876 } 3877 3878 retrc = 0; 3879 3880 tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); 3881 3882 if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { 3883 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); 3884 goto req_irq_failed; 3885 } 3886 3887 if ((rc = vio_enable_interrupts(vdev))) { 3888 dev_err(dev, "Error %d enabling interrupts\n", rc); 3889 goto req_irq_failed; 3890 } 3891 3892 crq->cur = 0; 3893 LEAVE; 3894 return retrc; 3895 3896req_irq_failed: 3897 tasklet_kill(&vhost->tasklet); 3898 do { 3899 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3900 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3901reg_crq_failed: 3902 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3903map_failed: 3904 free_page((unsigned long)crq->msgs); 3905 return retrc; 3906} 3907 3908/** 3909 * ibmvfc_free_mem - Free memory for vhost 3910 * @vhost: ibmvfc host struct 3911 * 3912 * Return value: 3913 * none 3914 **/ 3915static void ibmvfc_free_mem(struct ibmvfc_host *vhost) 3916{ 3917 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3918 3919 ENTER; 3920 mempool_destroy(vhost->tgt_pool); 3921 kfree(vhost->trace); 3922 dma_free_coherent(vhost->dev, vhost->disc_buf_sz, vhost->disc_buf, 3923 vhost->disc_buf_dma); 3924 dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), 3925 vhost->login_buf, vhost->login_buf_dma); 3926 dma_pool_destroy(vhost->sg_pool); 3927 dma_unmap_single(vhost->dev, async_q->msg_token, 3928 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 3929 free_page((unsigned long)async_q->msgs); 3930 LEAVE; 3931} 3932 3933/** 3934 * ibmvfc_alloc_mem - Allocate memory for vhost 3935 * @vhost: ibmvfc host struct 3936 * 3937 * Return value: 3938 * 0 on success / non-zero on failure 3939 **/ 3940static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) 3941{ 3942 struct ibmvfc_async_crq_queue *async_q = &vhost->async_crq; 3943 struct device *dev = vhost->dev; 3944 3945 ENTER; 3946 async_q->msgs = (struct ibmvfc_async_crq *)get_zeroed_page(GFP_KERNEL); 3947 if (!async_q->msgs) { 3948 dev_err(dev, "Couldn't allocate async queue.\n"); 3949 goto nomem; 3950 } 3951 3952 async_q->size = PAGE_SIZE / sizeof(struct ibmvfc_async_crq); 3953 async_q->msg_token = dma_map_single(dev, async_q->msgs, 3954 async_q->size * sizeof(*async_q->msgs), 3955 DMA_BIDIRECTIONAL); 3956 3957 if (dma_mapping_error(dev, async_q->msg_token)) { 3958 dev_err(dev, "Failed to map async queue\n"); 3959 goto free_async_crq; 3960 } 3961 3962 vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, 3963 SG_ALL * sizeof(struct srp_direct_buf), 3964 sizeof(struct srp_direct_buf), 0); 3965 3966 if (!vhost->sg_pool) { 3967 dev_err(dev, "Failed to allocate sg pool\n"); 3968 goto unmap_async_crq; 3969 } 3970 3971 vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), 3972 &vhost->login_buf_dma, GFP_KERNEL); 3973 3974 if (!vhost->login_buf) { 3975 dev_err(dev, "Couldn't allocate NPIV login buffer\n"); 3976 goto free_sg_pool; 3977 } 3978 3979 vhost->disc_buf_sz = sizeof(vhost->disc_buf->scsi_id[0]) * max_targets; 3980 vhost->disc_buf = dma_alloc_coherent(dev, vhost->disc_buf_sz, 3981 &vhost->disc_buf_dma, GFP_KERNEL); 3982 3983 if (!vhost->disc_buf) { 3984 dev_err(dev, "Couldn't allocate Discover Targets buffer\n"); 3985 goto free_login_buffer; 3986 } 3987 3988 vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, 3989 sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); 3990 3991 if (!vhost->trace) 3992 goto free_disc_buffer; 3993 3994 vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, 3995 sizeof(struct ibmvfc_target)); 3996 3997 if (!vhost->tgt_pool) { 3998 dev_err(dev, "Couldn't allocate target memory pool\n"); 3999 goto free_trace; 4000 } 4001 4002 LEAVE; 4003 return 0; 4004 4005free_trace: 4006 kfree(vhost->trace); 4007free_disc_buffer: 4008 dma_free_coherent(dev, vhost->disc_buf_sz, vhost->disc_buf, 4009 vhost->disc_buf_dma); 4010free_login_buffer: 4011 dma_free_coherent(dev, sizeof(*vhost->login_buf), 4012 vhost->login_buf, vhost->login_buf_dma); 4013free_sg_pool: 4014 dma_pool_destroy(vhost->sg_pool); 4015unmap_async_crq: 4016 dma_unmap_single(dev, async_q->msg_token, 4017 async_q->size * sizeof(*async_q->msgs), DMA_BIDIRECTIONAL); 4018free_async_crq: 4019 free_page((unsigned long)async_q->msgs); 4020nomem: 4021 LEAVE; 4022 return -ENOMEM; 4023} 4024 4025/** 4026 * ibmvfc_probe - Adapter hot plug add entry point 4027 * @vdev: vio device struct 4028 * @id: vio device id struct 4029 * 4030 * Return value: 4031 * 0 on success / non-zero on failure 4032 **/ 4033static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) 4034{ 4035 struct ibmvfc_host *vhost; 4036 struct Scsi_Host *shost; 4037 struct device *dev = &vdev->dev; 4038 int rc = -ENOMEM; 4039 4040 ENTER; 4041 shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); 4042 if (!shost) { 4043 dev_err(dev, "Couldn't allocate host data\n"); 4044 goto out; 4045 } 4046 4047 shost->transportt = ibmvfc_transport_template; 4048 shost->can_queue = max_requests; 4049 shost->max_lun = max_lun; 4050 shost->max_id = max_targets; 4051 shost->max_sectors = IBMVFC_MAX_SECTORS; 4052 shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; 4053 shost->unique_id = shost->host_no; 4054 4055 vhost = shost_priv(shost); 4056 INIT_LIST_HEAD(&vhost->sent); 4057 INIT_LIST_HEAD(&vhost->free); 4058 INIT_LIST_HEAD(&vhost->targets); 4059 sprintf(vhost->name, IBMVFC_NAME); 4060 vhost->host = shost; 4061 vhost->dev = dev; 4062 vhost->partition_number = -1; 4063 vhost->log_level = log_level; 4064 strcpy(vhost->partition_name, "UNKNOWN"); 4065 init_waitqueue_head(&vhost->work_wait_q); 4066 init_waitqueue_head(&vhost->init_wait_q); 4067 4068 if ((rc = ibmvfc_alloc_mem(vhost))) 4069 goto free_scsi_host; 4070 4071 vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, 4072 shost->host_no); 4073 4074 if (IS_ERR(vhost->work_thread)) { 4075 dev_err(dev, "Couldn't create kernel thread: %ld\n", 4076 PTR_ERR(vhost->work_thread)); 4077 goto free_host_mem; 4078 } 4079 4080 if ((rc = ibmvfc_init_crq(vhost))) { 4081 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4082 goto kill_kthread; 4083 } 4084 4085 if ((rc = ibmvfc_init_event_pool(vhost))) { 4086 dev_err(dev, "Couldn't initialize event pool. rc=%d\n", rc); 4087 goto release_crq; 4088 } 4089 4090 if ((rc = scsi_add_host(shost, dev))) 4091 goto release_event_pool; 4092 4093 if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, 4094 &ibmvfc_trace_attr))) { 4095 dev_err(dev, "Failed to create trace file. rc=%d\n", rc); 4096 goto remove_shost; 4097 } 4098 4099 dev_set_drvdata(dev, vhost); 4100 spin_lock(&ibmvfc_driver_lock); 4101 list_add_tail(&vhost->queue, &ibmvfc_head); 4102 spin_unlock(&ibmvfc_driver_lock); 4103 4104 ibmvfc_send_crq_init(vhost); 4105 scsi_scan_host(shost); 4106 return 0; 4107 4108remove_shost: 4109 scsi_remove_host(shost); 4110release_event_pool: 4111 ibmvfc_free_event_pool(vhost); 4112release_crq: 4113 ibmvfc_release_crq_queue(vhost); 4114kill_kthread: 4115 kthread_stop(vhost->work_thread); 4116free_host_mem: 4117 ibmvfc_free_mem(vhost); 4118free_scsi_host: 4119 scsi_host_put(shost); 4120out: 4121 LEAVE; 4122 return rc; 4123} 4124 4125/** 4126 * ibmvfc_remove - Adapter hot plug remove entry point 4127 * @vdev: vio device struct 4128 * 4129 * Return value: 4130 * 0 4131 **/ 4132static int ibmvfc_remove(struct vio_dev *vdev) 4133{ 4134 struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); 4135 unsigned long flags; 4136 4137 ENTER; 4138 ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); 4139 ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); 4140 ibmvfc_wait_while_resetting(vhost); 4141 ibmvfc_release_crq_queue(vhost); 4142 kthread_stop(vhost->work_thread); 4143 fc_remove_host(vhost->host); 4144 scsi_remove_host(vhost->host); 4145 4146 spin_lock_irqsave(vhost->host->host_lock, flags); 4147 ibmvfc_purge_requests(vhost, DID_ERROR); 4148 ibmvfc_free_event_pool(vhost); 4149 spin_unlock_irqrestore(vhost->host->host_lock, flags); 4150 4151 ibmvfc_free_mem(vhost); 4152 spin_lock(&ibmvfc_driver_lock); 4153 list_del(&vhost->queue); 4154 spin_unlock(&ibmvfc_driver_lock); 4155 scsi_host_put(vhost->host); 4156 LEAVE; 4157 return 0; 4158} 4159 4160/** 4161 * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver 4162 * @vdev: vio device struct 4163 * 4164 * Return value: 4165 * Number of bytes the driver will need to DMA map at the same time in 4166 * order to perform well. 4167 */ 4168static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) 4169{ 4170 unsigned long pool_dma = max_requests * sizeof(union ibmvfc_iu); 4171 return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); 4172} 4173 4174static struct vio_device_id ibmvfc_device_table[] __devinitdata = { 4175 {"fcp", "IBM,vfc-client"}, 4176 { "", "" } 4177}; 4178MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); 4179 4180static struct vio_driver ibmvfc_driver = { 4181 .id_table = ibmvfc_device_table, 4182 .probe = ibmvfc_probe, 4183 .remove = ibmvfc_remove, 4184 .get_desired_dma = ibmvfc_get_desired_dma, 4185 .driver = { 4186 .name = IBMVFC_NAME, 4187 .owner = THIS_MODULE, 4188 } 4189}; 4190 4191static struct fc_function_template ibmvfc_transport_functions = { 4192 .show_host_fabric_name = 1, 4193 .show_host_node_name = 1, 4194 .show_host_port_name = 1, 4195 .show_host_supported_classes = 1, 4196 .show_host_port_type = 1, 4197 .show_host_port_id = 1, 4198 4199 .get_host_port_state = ibmvfc_get_host_port_state, 4200 .show_host_port_state = 1, 4201 4202 .get_host_speed = ibmvfc_get_host_speed, 4203 .show_host_speed = 1, 4204 4205 .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, 4206 .terminate_rport_io = ibmvfc_terminate_rport_io, 4207 4208 .show_rport_maxframe_size = 1, 4209 .show_rport_supported_classes = 1, 4210 4211 .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, 4212 .show_rport_dev_loss_tmo = 1, 4213 4214 .get_starget_node_name = ibmvfc_get_starget_node_name, 4215 .show_starget_node_name = 1, 4216 4217 .get_starget_port_name = ibmvfc_get_starget_port_name, 4218 .show_starget_port_name = 1, 4219 4220 .get_starget_port_id = ibmvfc_get_starget_port_id, 4221 .show_starget_port_id = 1, 4222}; 4223 4224/** 4225 * ibmvfc_module_init - Initialize the ibmvfc module 4226 * 4227 * Return value: 4228 * 0 on success / other on failure 4229 **/ 4230static int __init ibmvfc_module_init(void) 4231{ 4232 int rc; 4233 4234 if (!firmware_has_feature(FW_FEATURE_VIO)) 4235 return -ENODEV; 4236 4237 printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", 4238 IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); 4239 4240 ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); 4241 if (!ibmvfc_transport_template) 4242 return -ENOMEM; 4243 4244 rc = vio_register_driver(&ibmvfc_driver); 4245 if (rc) 4246 fc_release_transport(ibmvfc_transport_template); 4247 return rc; 4248} 4249 4250/** 4251 * ibmvfc_module_exit - Teardown the ibmvfc module 4252 * 4253 * Return value: 4254 * nothing 4255 **/ 4256static void __exit ibmvfc_module_exit(void) 4257{ 4258 vio_unregister_driver(&ibmvfc_driver); 4259 fc_release_transport(ibmvfc_transport_template); 4260} 4261 4262module_init(ibmvfc_module_init); 4263module_exit(ibmvfc_module_exit); 4264